I guess I'll have to mess with it more. I think I have some 1200 film discs that came in a sample pack. Maybe I'll try that on the 1000 hard block scratches, then go to 1500. You are right, it is hard to tell when the trizact pads are worn out.
I'm also wondering if some 2000 eagle film pads would help me out with those 1500 scratches, so I don't have to rub them out by hand. Even with a new Trizact pad and going over the panel 6 passes, I would have DA scratches that I couldn't buff out. I am only assuming that the problem is me not getting out all of the 1500 scratches. I really don't know what I was doing wrong. I eventually got a process that worked well...it just takes a very long time.