Hi Bill,
The purple Kompressor pads use a foam resin that is very similar to the RUPES blue foam cutting pads.
The purple Kompressor pad excels at doing correction work on just about any tool type. It's not as aggressive as using a true wool "fiber" pad as fibers are a more aggressive abrasive than foam.
The only reason I know of that this pad is not more popular is due to the slotted design unique to the Kompressor pad.
We used these for the
follow-up polishing step for the 25' Regulator used in our last boat detailing class.
Pictures & Comments: Marine 31 Boat Detailing Class - May 2015