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Painting A Boat Propeller
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Aug 16, 2024
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View Video Transcript
0:00
This edge ain't too bad. I mean, I might have a little bit of a nick right here that I can try and get out
0:05
This one right here has a pretty good bend in it. I'm going to try and just use some adjustments to get that one out
0:11
But this edge right here is probably going to give us the most trouble just because of the way it's like pushed in and it's already got a nick out of the blade
0:21
So we're going to try and do what we can to kind of knock this back and flatten it off the best that we can
0:28
and then we'll try and take any burrs off of the leading edges here
0:31
Let me fix these other two first. I was able to get it straightened out pretty good
1:12
I mean I've got a couple of birds here that I need to file down, but it's still got like a
1:17
it's still smashed. I don't know if you can really see it that much, but there is like a smash mark, but for
1:23
the most part, I got the blade straightened out about the blade
1:28
best that I can because that is I mean that's that's smashed it's not really that it's bent
1:33
it's more just smashed and I don't know if I can get that little bubble out I can work
1:39
it a little bit more and see if I can get it a little bit better but way straighter than it was
1:44
now as far as this one over here this one's probably going to be a problem and eventually that's
1:50
going to cause cavitation so no matter what that's going to be a problem but for what we're
1:56
going to be doing with it. I'm just try and kind of knock that down, bend it out a little bit
2:01
I might even use a hammer and then we'll come back and you see these like burr cuts right here
2:07
I'm going to file those down with a file. This thing's about ready to throw the blade anyway
2:11
Look at that. That looks like the blades almost cut. Really there's not much else I could do with that. I've got it down. I've got it down
2:26
as much as I can get it but that thing's just gonna snap off of there if I hit it or try and bend it anymore
2:32
so we're just gonna try and knock that down and go ahead and get all these burrs off the edge of this blade with a file
2:41
all right we got most of these edges of this blade with a file all right we got most of these edges all
2:56
looking pretty good got them filed down they they feel right there's not a lot of burrs on there
3:01
that one's looking good this one's about as straight as we can get it it looks like you know it's still
3:07
got a little bit of a bend to it but not much we can do there i've got it as straight as i can
3:13
really do um not really a machinist but over here this is where i think we got a legitimate
3:20
concern i got that knocked down and straightened out as much as possible i could probably file that a
3:25
little bit more, but I want to try and get this paint that's on this prop. I want to try and get
3:31
this stuff off and also scuff up this to get it prepared for paint. But if you look right there
3:38
you can see that crack all the way along there. So I want to, I'm going to take this wire brush just
3:44
to try and knock all this paint down and see if I can't scuff this up and get a better look at
3:49
this right here because this thing, it looks like it's about to throw this a big chunk out of the
3:54
blade already. Not sure if you can really see that crack on the camera. See if I can't get it
4:01
right. There it is. Now you can kind of see it right there. So let me sand this down some and see
4:09
if I can't expose this. On the other side, you can't see anything. So, you know, it's just on the
4:17
back side, but definitely, definitely has taken some abuse, this prop here. But again, this
4:24
This is for a trial run, I want to try and paint this thing and then run it and see how long
4:29
that paint lasts. Obviously we're going to have, the paint's going to chip because this is going to create cavitation
4:35
Anytime you have nicks or stuff like this in a propeller, that's going to cause cavitation
4:39
Okay, so here is the edge that I got that thing pushed down
4:52
I just kind of smoothed that off with some 120 grit on the polisher
5:00
You could use a drill. I have this nice little polisher. You just need these little tips like this
5:05
And then this is a red Scotchbrite. So I first hit it with the wire wheel and I wanted to see how that did but I wasn really I didn really like how smooth it was I think that using the red Scotch bright is going
5:19
to be the right enough scratches or enough for it to allow the paint to stick to the propeller
5:26
I don't think the wire wheel is enough to get paint to stick to it. It just seemed to be too
5:32
fine but now that I have the Scotch bright it seems to be a lot better and
5:38
and it's going to be, I think paint's going to stick to that nicely
5:42
So I'm going to go ahead and continue to use this red scotch bright
5:46
and we'll sand all the rest of this propeller all the way down on both sides of the blades
5:51
and then we will be able to clean it up and prepare it for paint
6:08
I'm going to be. Okay, so now it is pretty much sanded all the way down
6:47
These inside edges here were the hardest to get, but I've got pretty much, it's ready for
6:53
paint for the most part, like this right here. Realistically this prop needs to be, like that needs to be welded and then ground down, but
7:03
we're not going to be doing that with this propeller. We want to do the paint trial here
7:07
So this is all sated down. I just used wire bristles on the drill, just two different types to kind of get into these
7:14
edges and then also a Scotch Bright pad, both the red and this brownish color one
7:22
I'm not sure what that grit really is. But that's all I used to kind of get everything off
7:28
I didn't have anything but like an 80 grit and I think 80 would have been a little bit too
7:32
aggressive for this. Even though that's pretty scratch. I don't think I would have done any more damage
7:39
I did have a 120, but even 120 was a little bit more aggressive than I would have liked
7:44
So I think 180 maybe would have been a good number. But 220 probably wouldn't have been enough
7:52
But other than that, this thing is ready to be cleaned, and then we can go ahead and prime it
7:57
We're going to be using this automotive primer. It's a self-etching primer for aluminum and metal
8:06
And then we're also going to be painting it with the engine enamel, 600 degrees, ceramic coating, black paint
8:14
And then we're going to be finishing it off with some high heat ceramic coating 2,000 degree clear coat
8:21
So that is going to be our process here for the painting
8:26
I need to hit it with some degreaser and then give it an acetone bath style that way
8:31
We can get any kind of grease or anything off of here that's on here from sanding it
8:35
I'm not going to do anything with the inside. I'm just going to kind of wipe it out and clean it out. I made a little stand here
8:40
It's just a piece of wood with a little one by one and a nail sticking up the top of it
8:45
That way I can kind of, you know, move the prop around as we paint around it
8:50
And so let me go ahead and give this a bath and we'll hit it with the first coat of the primer
8:56
which again, this is a self-etching primer. Now we've got the prop degraised and cleaned up with acetone
9:28
I went ahead and set it up and sprayed it with contact cleaner so I way everything is completely
9:35
Clean, dry, no dust, no nothing on it. So now we can let this sit for just a couple of minutes
9:42
just to let that contact cleaner dry off of there. And then we'll go ahead and start spraying the first coat of primer
10:05
I'm going to be able to the the xif the the I'm the the so I'm the I'm
10:21
I going to go ahead and let this sit for about 15 minutes or so
10:47
It doesn't take long. It's nice and hot outside. Humidity is a little high
10:52
so yeah about 15 minutes this will be ready for another coat and I'll probably do I don't know like three maybe four coats of the primer and then we'll start painting after that but I want to do real thin coats just because we want to let this you know have a good bond to it
11:22
It's actually getting pretty hot, pretty quick
11:39
This is three coats of the primer and it's matting up really nice
11:44
So I'm going to go ahead and hit it with a fourth coat. I think I'll only do four
11:48
It says that 30 minutes after you can run the top. coat so because it's so hot I might be able to hit a top coat within 20 minutes of my last coat
12:00
but I mean I have been putting it on pretty thin I got thick in a couple spots so like right
12:04
here it's filling in those so I might give it a couple more coats just to try and fill in
12:11
like I'm not sure if you can see the differences right there in the material where the metal has
12:19
a little bit of pitting so I want to I might try and fill that in
12:43
So this is five coats. It is not fully dried yet, but this is five coats of the primer, which is probably
12:50
totally unnecessary, but we're going to go ahead and let this dry
12:54
It says 30 minutes between coats or 30 minutes until the top coat
12:58
So we're going to let this sit for 30 minutes, maybe a little bit longer
13:04
I mean, 30 minutes is probably going to be good. It is getting hot out really quick today. So after about 30 minutes, we'll come back and start spraying our black top coat
13:12
And that's just over 30 minutes of dry time, nice matte type finish with the primer
13:17
So now we're going to go ahead and hit it up with the black. paint so we're going to run our first coat right now. I've been having a great day, but things
13:26
just took a turn for the worst. This is going to be a freaking out of freaking hard
14:19
Well, this is going to be extremely hard to paint with this tip here because it comes out in this flat overspray, like a 12-inch spray
14:28
And I laid a curtain and a half down here on the bottom
14:32
So I don't know what I'm going to do about that. I guess I'm going to have to wait and kind of sand that thing out
14:41
I'm going to see if I can't find a different tip to put on here because in order to get down in that angle, that's that's
14:49
spray pattern just is not going to work. Yeah, there's just no way
14:56
I mean, look at that. That is ridiculous, dude. So, yeah, no, I'm going to have to sand that a little bit
15:02
So I waited until it was dry to the touch, and then I just kind of like finger smashed the wrinkle out the best I could
15:08
I'm just going to go ahead and paint over it. That'll be all right
15:13
It's just one little wrinkle down here. But I was able to kind of smush a lot of that
15:19
out. We'll see how it covers, but I just changed the tip of this to the same one that
15:27
was on the primer can so now I'll be able to lay, you know, even coats at least. So
15:33
that gonna be there It gonna be a signature signature Okay, so this is three coats and it's not like a silky smooth color
15:53
I think it's because it's the ceramic coating for 600 degrees. So I'm sure that has to do with why it's not, you know, it's glossy, but it's totally not laying on like silky
16:06
smooth like you would want and it goes on so thick that I've been putting curtains all over
16:11
this thing so that's just going to be what it is if you use this type of paint just have that
16:17
in mind that that's what it's going to come out it's not going to come out like a like a smooth
16:21
type finish but I'm going to go ahead and hit it with the rest of this can I might have two
16:26
more coats in this can I'm going to hit with those two and then we'll start the clear
16:30
coating process so when I thought that my day couldn't get any worse it gets worse up
16:35
Well, I think this looks terrible. Super bubbly. Not even close to smooth
16:44
So thick that it would start to run. That is definitely not a good paint to use on a propeller
16:52
You should definitely use something more like a satin. Not really satin
16:58
It's not really the finish. It's got a glossy finish. It's just the way that the paint lays on that thick
17:03
It's that ceramic paint. So I would definitely try and go with something else
17:09
I'm not sure what, try a different kind of paint, but definitely not engine paint for your propeller
17:16
Anyway, I'm going to leave this like this. I'm going to clear-coat it because I just want to again see how this holds up over time, so let me start clear-cote. I'm
17:55
This thing
18:07
It's lit, dude. I mean this thing is so ugly
18:27
I don't know if maybe I just was going too quick or what it was I could not get that paint
18:33
to lay on there smooth it's super orange peely the clear coat is all bubbly um
18:39
yeah I don't know this thing looks terrible I got wrinkles there
18:45
wait until I get this thing in the light I'm gonna do a couple more passes with the clear coat
18:49
and then when I bring it inside I'll show you how bad this looks when I get it inside
18:52
because this looks terrible Well, I mean, we'll see. I also about messed this up pretty bad too because I accidentally grabbed an aluminum can of the clear coat, not actual clear coat
19:09
So luckily I didn't spray this on the prop, but that would have been very bad because, well, yeah, that's what it would look like
19:17
So good thing I tested this and did not use this and went back and got some clear coat
19:21
But side note. Yeah, ceramic was not the play. I mean, I guess now that it's dried for a couple of days
19:27
this doesn't look as bad as it originally did. Maybe I just do not know how to lay this stuff
19:34
I mean, this is a really hard paint. I mean, you know, there are some spots like this doesn't look that bad
19:41
and then this one's, you know, not really that bad. I got some major wrinkles here, but like over here
19:48
this looks really good right here, but then right there, I have no..
19:52
idea maybe I just don't know how to lay ceramic paint which is probably all it is so
19:58
maybe if you knew what you were doing you could get a better shot at this but even if I
20:03
flip this thing over look at the look at the back of the blades maybe that's in the
20:09
metal in that I just needed to fill the blades maybe that's what that is maybe that's
20:14
just the pitting in the metal but you know maybe somebody that knows more than me
20:20
can let me know what's up but you know I guess I guess it doesn't look as bad as I thought, it does look pretty, pretty bad
20:27
But for what it is, and for what this prop is, obviously this, you know, Nick right there is going to be a problem and it's going to cavitate
20:36
But from where this prop originally was, we're going to see what this looks like
20:40
And now is where everybody's going to be mad because I'm going to go ahead and put this on the boat and then I'm going to run it for a year
20:48
And then we'll revisit this and see how this paint holds up and how much time it takes over
20:52
for one year and what it looks like after that
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