Originally Posted by Sodar
If you are not going to step it up to 1500 or even 2000, a 7424 with a foam pad is not going to get the sand marks out. If you are concerned about using a circular with wool and 3M HD Compound, step up the sanding. The finer the paper and the scratches, the easier it will be to get them out.
This! You are never going to get the 1000 scratches out unless you are using a heavy cut compound with wool.
That orange foam with your Porter Cable doesn't have near enough cut.