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Started By
Message
Need advice....Painting aluminum on a boat?
Posted on 6/23/22 at 2:46 pm
Posted on 6/23/22 at 2:46 pm
I have a Hurricane deck boat and I need to repaint the aluminum panels that run above the fiberglass "tub" of the boat.
I have stripped the paint and decals off and what I have found out so far is to use a self-etching primer, use 4X steel wool or 1200 grit sand paper and lightly sand the primer, then recoat with SE primer and lightly sand again before painting.
Question/advice needed.
What is the best paint to use for the top coat? Enamel? Acrylic Enamel? Acrylic Latex? etc. etc.
Absolutely useless to ask anyone in the paint department at a big box store and no better at the local Sherwin-Williams.
Thanks in advance
I have stripped the paint and decals off and what I have found out so far is to use a self-etching primer, use 4X steel wool or 1200 grit sand paper and lightly sand the primer, then recoat with SE primer and lightly sand again before painting.
Question/advice needed.
What is the best paint to use for the top coat? Enamel? Acrylic Enamel? Acrylic Latex? etc. etc.
Absolutely useless to ask anyone in the paint department at a big box store and no better at the local Sherwin-Williams.
Thanks in advance
8
Posted on 6/23/22 at 2:47 pm to ForLSU56
What kind of equipment do you have to spray? You should prime based on what you will paint with.
Posted on 6/23/22 at 2:50 pm to ForLSU56
You're going to want to go with trydexil rollatnum it seems to have the highest reviews and is what i used on mine. I wouldn't personally use anything else.
Posted on 6/23/22 at 2:55 pm to ForLSU56
I used rust oleum's enamel made for Aluminum with good success and the prep you're talking about. I built a pirogue rack and that's what I used.
Also, I refurbished an aluminum boat years ago and I got the gunnels, hatches and console all powder coated. Worked out great and something to consider. Any local shop can do it.
Also, I refurbished an aluminum boat years ago and I got the gunnels, hatches and console all powder coated. Worked out great and something to consider. Any local shop can do it.
Posted on 6/23/22 at 2:56 pm to bigbuckdj
I have a regular siphon feed spray gun. If needed I can get a gravity feed.
Posted on 6/23/22 at 3:16 pm to ForLSU56
Use an industrial enamel. We paint commercial aluminum signs with a product called Imron. It's a polyurethane paint and you can get it in a direct to metal so you can skip the primer part. It's the paint used to paint heavy equipment and railroad equipment. I have found it to be a very durable and good looking paint over something like the Sherwin williams industrial enamel. Only downside is it's about $230.00 per gallon not including the reducer and activator.
IF you want to go cheaper route the same company makes a good DTM product called Tufcoat. It's pretty similar to the Imron, but $45.00/gallon.
IF you want to go cheaper route the same company makes a good DTM product called Tufcoat. It's pretty similar to the Imron, but $45.00/gallon.
Posted on 6/23/22 at 3:19 pm to ForLSU56
Is it a bunch of aluminum?
I would use kem 400 as a top coat if your Sherwin Williams place will order industrial coatings. P60G2 wash primer and R7K44 catalyst is what I’ve used under that. Maybe another brand or type of enamel/primer system would work better or just as well, I don’t have experience with other brands.
Prep is everything. On smooth aluminum you really need to use a strong degreaser and remove every little bit of dirt, oil, grease, and moisture.
Edit: it looks like kem 400 also says you can use kem aqua wash primer under it for aluminum. To the point above, I haven’t used it, but Imron definitely looks better and seems to be pretty awesome stuff from what I’ve heard.
I would use kem 400 as a top coat if your Sherwin Williams place will order industrial coatings. P60G2 wash primer and R7K44 catalyst is what I’ve used under that. Maybe another brand or type of enamel/primer system would work better or just as well, I don’t have experience with other brands.
Prep is everything. On smooth aluminum you really need to use a strong degreaser and remove every little bit of dirt, oil, grease, and moisture.
Edit: it looks like kem 400 also says you can use kem aqua wash primer under it for aluminum. To the point above, I haven’t used it, but Imron definitely looks better and seems to be pretty awesome stuff from what I’ve heard.
This post was edited on 6/23/22 at 3:32 pm
Posted on 6/23/22 at 4:22 pm to bigbuckdj
It's only the upper panels (totally above water) on a deck boat. Probably 45 - 50 square feet total.
Posted on 6/23/22 at 5:27 pm to ForLSU56
You’d save a lot of time and probably a lot of money just replacing the entire panel with the OEM style powdercoated. A 12 ft roll is about $100.
Posted on 6/24/22 at 2:51 am to ForLSU56
quote:
Aluma Hawk is a quick-dry, high-solids, corrosion-inhibiting coating designed for use on aluminum with no need for a primer. Aluma Hawk is chromate-free and may be used above or below the waterline, but contains no antifouling characteristics. Aluma Hawk's unique dual-purpose phenolic resin, allows it to be used as a primer directly on metal with or without a topcoat.
LINK
Posted on 6/24/22 at 8:14 am to ForLSU56
Never have heard of using 1200 grit then painting.
In fact have read cautions about using getting too fine of a finish before spraying. Supposedly some products will bead up or run as if it had been waxed. Of course I have never painted aluminum.
In fact have read cautions about using getting too fine of a finish before spraying. Supposedly some products will bead up or run as if it had been waxed. Of course I have never painted aluminum.
Posted on 6/24/22 at 8:41 am to awestruck
320 is fine for aluminum. 1200 is a little overkill.
Posted on 6/24/22 at 8:46 am to ForLSU56
Not sure where you are located, but at Stine and Home Depot there's a grey and green choice for "aluminum boat paint" right next to the john deer green and yellow paints.
Posted on 6/24/22 at 9:34 am to tenfoe
Home Depot carries the Duralux Marine Paints. I've been researching those and it looks like what I will probably go with.
Thanks all
Thanks all
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