Cool. Great find. A mist of acetone to burst the bubbles that have risen to the top. Who the hell would have thought of that. Its like sticking youre fingers in the toaster to get better toast. Works but how the hell do you discover that.
I was talking to my brother on the weekend who has been building boards for a lot of years and he also mentioned applying the additional layer of resin and then hitting it with a heat gun as this fellow said was possible. I have also heard that if you stick your pot of resin in a vacuum chamber prior to pouring that the lower pressure helps to out gas the resin,although I'm guessing much of the air bubbles are introduced during the pour and soaking of the glass.