I had a similar experience with KBS Diamond Finish. I followed all the recommendations (including thinning with KBS thinner) and using foam roller...I got bubbles and some streaking. I ended up spraying it and it worked really well. The reason I wanted to try this product was that I didn't want to deal with spraying. This stuff is hard as rock once cured.

BTW I had to demolish the can just to open - seems like I'm not the only one to have had this problem. I'll use SprayMax in the future as that was supper easy.