I had a day like that three weeks ago. I had worked on laminating an acrylic blank for three days. I drilled it, glued the tubes in, squared it up, turned it and sanded it with absolutely no hiccups...stop to think of it, that should have tipped me off right there...but then as I was applying the polish, I must've created too much heat because the next thing I know, I am feeling a bump right in the middle of the blank. When I stopped the lathe to look, there was a big melted bump right there in the center of the blank. A total loss. I still haven't gotten up the strength to start that project over.