That should work, but I would be careful with the acetone wipes. On some boat building forums
, some have had bonding issues after using acetone. What is more appropriate, is to wash the cured resin with fresh water
and a scotchbrite pad to remove "amine blush" which occurs with some epoxies, then sand.Don't just sand without cleaning
, the blush gets driven into the epoxy. The blush can cause a lack of bonding. The MAS epoxy is a none blushing epoxy when you use their slow hardener. In all honesty, I haven't used MAS for any glass repair work, but have built a couple of wood kayaks that are glass covered, and have been very happy with the product. Because that is what I have in my shop now, I would use it for a glass repair, if I had to do one.
I would get glass on both sides if at all possible. Three layers would be good, one on each side would probably work also. While you are up to you elbows in epoxy, more could be better. Also, you don't have to do all layers at once, if it becomes difficult to deal with it. I have read somewhere, that one of the epoxy companies did testing, and found no real difference between all layers at one time or one at a time. Actually, I think they found one at a time was better, because it was easier to control resin to glass ratio. The real strength is in the glass, not the epoxy.