Issues painting with appliance epoxy

[makejetskiinggreatagain]

I painted the bottom deck of my ski with black appliance epoxy because i wanted a quick way to touch up scratches from the bunks or beaching it. I sanded the whole thing with a palm sander with 400 grit sandpaper. The can specifically says NOT to use primer, so i went with the recommendation and sprayed the paint directly on my roughed up bottom deck, after wiping it clean with acetone and a tack cloth of course. After just a few rides my paint is coming off in sheets in areas that havent touched anything but water. What did i do wrong? Should I have used primer? should i have used a coarser grit when i sanded it? What do i need to do different when i redo it? Those of you who have used this stuff before, what did you do?

 

[Ducky]

How long did you let the paint sit before you rode it? From what I have read and what people have told me, you have to let that stuff sit for like a week to cure.

 

[txsuperjetfreak96]

Haven't ever had success using appliance epoxy. I always end up putting it on to thick, and don't set up right. Thin coats is key and let setup good

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[makejetskiinggreatagain]

How long did you let the paint sit before you rode it? From what I have read and what people have told me, you have to let that stuff sit for like a week to cure.

It sat for 3 weeks while i finished the rest of the build lol

 

[Ducky]

Also, I am pretty sure you supposed to lay down all of your coats of epoxy paint shortly after the previous coat is applied, and not wait for it to dry. I think it kills the curing process.

 

[makejetskiinggreatagain]

Haven't ever had success using appliance epoxy. I always end up putting it on to thick, and don't set up right. Thin coats is key and let setup good

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I put it on a little thick i suppose but not thick enough to get any runs. would that make it come off like it is?

 

[txsuperjetfreak96]

Lol last time I used it. It wrinkled on me next day was still goowy underneath

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[makejetskiinggreatagain]

Also, I am pretty sure you supposed to lay down all of your coats of epoxy paint shortly after the previous coat is applied, and not wait for it to dry. I think it kills the curing process.

i layed down all of the coats in the same night. i just painted the bottom deck before i flipped it over to work on the fiberglass needed for the top deck

 

[Ducky]

Same here, but we tried to clear coat it before it was cured and that is when it wrinkled.

 

[makejetskiinggreatagain]

did you guys use primer?

 

[txsuperjetfreak96]

I did used some can stuff from autoparts when I was gonna do bottom of my rn, started then realized I had bunch of pin holes to fix

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[Ducky]

did you guys use primer?

Yes, I used a sandable primer

 

[Henry Stephen]

Was the surface roughed up enough? 400 may have not made a good mechanical bond (to start)

 

[Yami-Rider]

I have used tile clad epoxy from Sherwin williams on many ski's with great success. I would say, not prepped properly.

 

[makejetskiinggreatagain]

Was the surface roughed up enough? 400 may have not made a good mechanical bond (to start)

that's probably my issue. I sanded the top deck the same way but painted that with automotive paint. That's holding up perfect. I think maybe I should just sand the whole bottom deck with like 150 grit and respray it

 

[Jakobi86]

I sprayed mine with gel coat. Buddy sprayed his with auto paint. The paint grabs the trailer bunks like hot glue. It's unbelievable how tacky it grabs. The gelcoat is hands down holding up better. And if your using an epoxy paint (2part mix?) I don't see why people wouldnt go with gelcoat instead for not much more effort


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[makejetskiinggreatagain]

the epoxy paint I am using isn't a two part mix. it comes in a spray can just like other spray paint which is why I was so keen on using it. For 6 bucks I can cover the whole bottom of my ski and since its the bottom deck I wasn't super worried about the finish. I figured I could touch up scrapes super quick and cheap. I used this paint instead of normal spray paint because it goes on thicker and everyone said its practically indestructible.

 

[Henry Stephen]

I would question a one part epoxy.

 

[Big Kahuna]

If I am not mistaken, Appliance paint is meant to be used on metal surfaces............ I used on it some forks on a mountain bike once and it was incredible strong............

Best I found for hull bottoms was Single Stage Urethane paints. That stuff is strong.

 

[VXSXH20]

Wet, what was your temp and humidity if you recall? I used both white and now the black rustoleum appliance epoxy. I sprayed it while 85+ degrees and let sit for 2 days. my bottom was sanded with some 160 grit and acetone wiped down. then sprayed off with compressed air. it is hard as nails. I remember most of your fx1 build was in the somewhat cooler season no? sand it down and you "might" be able to use some dupli color adhesion promoter.. don't quote me.. read up on it. Ive used it for a lot of plastics and trim with good results. here is the white...