Oh the woes of resin... This is great stuff, if you have patience. The bubbles are normal. The down side, you have to frequently keep checking back to make sure new ones don't form. I let it sit for about 5 min. Then check, if there are bubbles, I use a hand butane torch to heat a pop the bubbles. let it sit for a few and recheck, I keep doing this until I see no more bubbles. It's a pain. But, once done, it's great.