Epoxy vs Vinylester

[Blue_Heron]

...not so with epoxy it usually takes a layer of whatever it landed on with it.

I haven't used vinyl ester, but I have used epoxy so I'll add to the anecdotal data. I forgot to clean up a ribbed aluminum roller after an epoxy layup and found it stuck to the deck the next day. When I pulled it off, it took a neat chunk of the gelcoat with it. So the epoxy's secondary bond was stronger than the gelcoat's (presumably) primary bond.

I've been buying my epoxy from US Composites. Their epoxy is at about the same cost as their vinyl ester @ $45/gallon, so for me it's a no-brainer.

Dave