If you are trying to acquire a smooth finished cabinet without any grain showing. After being painted you need to seal and fill the pores and grains to accomplish this. If you don’t, the cabinet will continue to absorb the primer and paint. This really helps when refinishing older oak stained cabinets, bathroom vanities or even doors.
Yes, you can apply the grain filler as long as the previous coat is cured per the manufacturer of the paint or lacquer. Scuff sand with 220 grit sandpaper. You can then apply 1-2 coasts of the grain filler as instructed and prime and paint once again.
We recommend 1 quart for a kitchen with up to 35 doors and drawers using two coats. This product has a shelf life greater than one year.