oh yeah, I used a dremmel to cut metal for the frame of a small robot once and I went through like 10 disks. One time a shard of disk nailed me square in the safety glasses. Anyway I went back down there after the supposed 2 hours cure time and it was still tacky in some places. I decided to try to sand it anyway to see what happened (with a power sander) and it sanded ok and then the stuff was hardened by the time I was half way done. I took off the hanging edges and power sanded through the air bubbles and then hand sanded them long ways to make it smooth. Hopefully I will be able to finish the rest all in one day sometime this week now that i've got the hang of working with this stuff.
thanks all for your help