We experienced complete Wooden cabinets from 1961 that were unpainted, so we sanded and did various coats of primer simply to cover the knots and oil stains. Now I feel we could have utilised a knot blocking solution. We also painted every one of the backs and interiors of drawers http://cabinetpaintprimer85284.collectblogs.com/17400878/a-secret-weapon-for-cabinet-paint