The Mystery of Oil Paint – Can I paint over Oil/Alkyd paint with Latex/Acrylic paint ?
A. It is best not to paint over Oil/Alkyd paint with Latex/Acrylic, but it is possible if you first prime the surface with a conversion primer such as Aqualock products. This will take you from one type of paint to the other. Note that the older the oil paint being painted over, the better the adhesion of the latex paint. It is also recommended to sand your oil base coat with a rough grit sandpaper.