I did a third coat Glass Craft 3 on my first resin piece (800 x 400) last night and I checked it two hours later and was looking good - this morning it has several pits.

I did lots of preparation , I sanded it down to a flat smooth surface with a random orbital sander. I cleaned the surface many times , dried and blew it over with canned air. I washed it with acetone and made sure it was very dry. It was levelled out and pre heated before I did the pour. All the temps looked good and I made a cardboard box to cover it after the pour and I get this result. I am thinking that I have to change my brand of resin.

Simply can't carry on getting these results.

What sort of grit are you sanding to?  It sounds like the resin is properly fisheyeing off the surface to open up like that. That is usually a sign of some contamination or too smooth a surface (or a bit of both).

We would normally key to a minimum of 240 grit - although  120 is typically the norm - and then clean the resin surface afterwards to remove dust and dirt from sanding.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant