Used for built-in bookcases and cabinets, and interior trim
Prep: MDF (medium-density fiberboard) absorbs moisture and can become "fuzzy," so skip washing it. Sand unprimed material with 150-grit paper to give it tooth. Factory-primed material is ready for paint.
Coat: To keep the material from swelling, choose a shellac- or an oil-based—not a water-based—primer, covering the cut edges with two coats. Top it off with latex paint, using a small brush to cut in and a short-nap (up to ½-inch) roller for even coverage over large areas.