I've just finished jointing and sanding some new drywall, and today and tomorrow I plan to paint.
I know that I need to put down a solid coat of a good primer-sealer, because of the different absorption qualities between joint compound and wall board. But I'm wondering what prep I should do prior to putting down the primer?
That is, the surface was very dusty, because of the sanding. Other than that it is clean and dry.
I went over the surface with my shop vac, and pulled up most of the dust.
Will that be sufficient? I've thought about a light mopping, but I'm afraid the water might raise the surface. Most of my experience has been re-painting old walls, and there I'd always cleaned the surface with TSP. I'd not think that would be necessary, on new wallboard.
Is there any further prep needed?