With the little amount of time I've had to work on it, the floor patching is complete and I've began to remove the remaining surface rust before priming. There is some slight pitting on the driver's side near the shifter. I decided, after reading so many good things, to use the Klean Strip Phosphoric Prep & Etch to remove the surface rust. I tried it on some tools and it took the rust right off. It is sprayed on, worked in with steel wool, and then washed off with soapy water. It looks as though the rust has been removed from the pits, they are more of a dark grey color now rather than brown. Is it ok to prime it at this point? It doesn't seem as though I can get any more brown rust off the surface.
I am using Spray Max 2K aerosol epoxy primer with Eastwood brushable seam sealer to follow, before paint.