Originally Posted by 33Willys77
If this is just a base primer you are trying to sand, why go with such a fine grit? For a full / big job - do your bodywork, ruff it in down to 80, prime it, block it straight with 80, prime it, block once more with 180, final prime and sand it with 400. Then seal it and paint (wet on wet).
the 600 was only because I was doing metallic, but was not considering that it is a moot point when I'm putting sealer over it anyways.
What I'm going to end up doing is final block with 220 as I've done, two coats epoxy, then wet sand with 600. I won't be able to put paint on wet on wet.