redbenjoe said:
ok -- then you skipped the 800 and 500 -- right ?
and what was your drill speed ?? ( approx )
---plastic MELTS FAST !!!!
The pressure applied is lessened to some extend by the foam. Pressure applied, the speed, size of the particles in the media or papers all are factors that influence the heat generation. Some plastics haze with heat before it deform and melt and it is an irreversible damage. The passes we make should be uniform also or else will result in high and low areas. The worst thing to happen is trapping any debris on the rotating pads. That will make ugly pigtails on the surface.
P2500 grit paper got Average particle diameter 8.4 µm.
P2000 grit paper got Average particle diameter 10.3 µm.
P600 grit is a 25.5µm.
P400 grit is a 35.0µm.
I would start with P2000 like Joe did and work it through.
Once I worked on the polycarbonate headlight lens with a drill and pad. I cleaned the surface pretty good before I started the work. There were a few small dings on the surface trapping debris and it got on the rotary pad and made several ugly pigtails.