I tried to put a layer of acrylic paint (from a spray can) on the rails of my newly shaped mini simmons board. This was after the lamination, but before the hot coat (fill coat). When I went to apply the hot coat, I got fish eyes like crazy…everywhere that I had painted with the acrylic spray paint (Montana Gold).
Ideas? It was my understanding that Montana Gold is water based and I would be ok. I guess not. Should have ‘tested’ a small section (or another piece of board), but hindsight…
What gives? Not waterbased?
Ideas now? Sand off the entire paint section and start the hot coat over?
Thanks for the help.
Was it glossy paint?
Try matte or flat finish.
I spray acrylics all the time.
Water-based from a gun.
No problems.
I have lammed over Montana Gold spray with no issues. Have not hotcoated over it though. That was using Resin Research epoxy. What resin were you using?
I am curious about this too. My last board I used a colored sharpie to cover it some spots. When I went to do the final coat it fisheyed every part where I put the sharpie. A more experienced guy then myself, taught me a cool trick when doing a carbon fiber lam, if the fibers move a little and you see a white spot, you can just use a black sharpie, and it looks ok.
Point being, I have done it before and never had a problem, but for some reason this time it fisheyed pretty bad. I think I might have had a bad batch of epoxy, because for using that particular 1.5 gallon epoxy kit, whenever I did any finish coats, it was a bitch to lay it down nice.
Sharpie bleeds with epoxy. You can minimize it if you are careful. Water based Sharpie poster pens do not bleed.
ive had similar issue once. acrylic spray on top of sanded hot coat. then applied final coat and it fish eyed all over. never had an issue with doing it on the foam under the lam.
Yes I had that experience, painted the rails black acrylic from the Apple Barrel brand using a foam brush, on top of hotcoat (epoxy) , when I put the gloss it fisheyed everywhere where the paint was, next time ill be doing a thin cheater coat on top of the acrylic before glossing.
The epoxy could be fish eyeing because of excess debris (paint) or oils from your skin or the product. The paint on top of the lamination is a bit unorthodox, and unlike airbrushing directly onto the foam, the epoxy can’t really soak into the paint and bond to the cured fiberglass since the paint is already doing so. Just some thoughts. Sand it off, and maybe do the rail color with pigmented resin instead.
Wipe a thin coat of epoxy on the board with a squeegee to get the contaminates off. Apply hot coat after the wipe coat starts to harden. This wil;l reduce the amount of fish eyes.
Not to hijack the thread, but that was part of the problem I had. It was pretty weird. I remember reading that advice at some point. I tried putting a cheater coat with another jug of epoxy and it worked pretty well.
With this batch, I did it, and tried numerous times, many different conditions and boards, and when I would go to put the follow up coat, the epoxy would bead up like water on a hydrophobic surface. As long as I wait for the epoxy to harden and sand it a little, it works otherwise it beads up when done over itself. I am pretty meticulous with mixing, my cups, clean surfaces, etc…
Has anyone else experienced this? I was pretty sure I just had a bad jug.