Epoxy

i had a disheartening situation tonight. I’m putting thin strips of bent wood on the inside lips of my deck hatches to seal against the foam on the underside of the hatches.  I hot glued blocks onto the deck for clamp blocks.  Long story short, I knocked off one of the blocks and a chunk of epoxy went with it revealing the fiberglass below.   I’ve searched the old archives briefly and didn’t find anything similar. Does anyone have any advice on how to make the least obvious repair?  I can’t sand any without getting into the glass.

I was at Defender Industries yesterday, during their big annual sale, and the place was full of salespeople. I was buying some MAS hardener (I already had the MAS resin), and one of them tried to sell me on this HAWK brand. Anyone tried it? Thanks.