meg's fine, medium, and heavy cut compounds are really meant to be used with a rotary. I've heard some people have used #2 with varying success via pc but I know meg's does not recommend it as the pc will not break the compound down completely. From my experience with medium cut, it's pretty abrasive. I would really suggest using something more along the lines of #83 or #80 if you are working with a pc. You will achieve better results without risk of damaging the surface. Hope this helps.