Sanding Guide Coat

Frodee said
I'm not sure what you're doing but I always do this on the last coat of primer. 320 grit dry sand with a soft block and that should find all the needed areas to be fixed. then sand it again with 500 grit dry paper or you can wet sand with 600 if you want.
I'm not the smartest guy around but been doing body work and paint for over 50 years and unfortunately still doing it.
I'm sure someone will chime in and prove me wrong as always but just my 2 cents.
Don't mind helping you if you need it.

I used to be a professional painter in a shop for years, got out of it a while back due to health reasons, but I do appreciate the offer to help! I typically like to use it after blocking with coarser grits to make sure I get all the sandscratches out, and sometimes on my final wetsanding just to make sure I got everything.
As much as working on the floor used to drive me nuts(shop owners mostly), I do miss it when something needs to be painted :)