There are special steps to take or risk problems in the future. Take a look at the following pages for more information about converting a surface from oil base to latex paint. Those are the three best ways to transition oil based paint to latex in order from easiest to hardest. The age and hardness of the paint will determine which will be the most effective for you. Remember to always do a test spot first! Call paragon painting. Once the surface has been fully sanded, youll want to apply a layer of latex conversion primer paint. Make sure you give it adequate time to dry and you cover all areas of the surface youre painting. Still not sure? Take a few mins here and you could tell also here. Sanding with coarse paper (maybe a heat gun but be careful) is the likely solution. On top of that, you will need to properly sand the underlying finish, to remove any sheen, prior to repainting. Good quality latex paint will adhere just fine to old oil-based paint if the surface is properly prepared.