Epoxy Blemish

Builder's Forum
1

I glassed and put on the wet out coat on my Auk.

The next day I put on the first fill coat. I didn't wipe it down or sand at all before putting the fill coat on. I put the fill coat on with a foam roller, but didn't tip it off with a foam brush. I sanded that down, and it appeared as if it smoothed nicely.

I vacumed the surface, lightly went over it with a tack cloth, and then wiped it down with a clean wet cloth. About 30 hours later I applied the second fill coat as I did before, but, this time I tipped it off with a foam roller. It looks like I could sand it, and all minor spots would easly be removed, but there a few spots, the biggist is slightly larger than a pencil eraser, that look like something kept the epoxy from flowing into it.

After it cures, can I tape off those areas, sand them, and then spot treat them with more epoxy? If I can do that, it looks like I can go right up through 180 or 200 grit without touching or seeing the weave.

I don't want to strive for mediocrity, but, I may not be that good at it yet.      Thank You!!

2

They're call fish eyes and it's the tack cloth causing it. It contains silicone which contaminated the epoxy surface and kept the new epoxy from sticking. Never ever use a tack cloth with epoxy.

Sand & wash it clean and reapply new epoxy, but this time use a clean cotton cloth wet with denatured alcohol to clean off the dust.

Good luck,

Laszlo

 

3

I wondered when I used it, but they have been around forever, so I thought it was safe.

Do you think, that when I can sand, if it looks loke I went deep enough and still have epoxy coverage over the cloth, that I can avoid another fill coat?

TKS