Q & A; Can you apply latex paint over oil-based paint?
The general answer is yes. However, it is vital that the surface be properly prepared. Generally, sand the surface until it’s no longer slick. Then wipe the surface down with a cloth and apply one to two coats of primer and let dry before applying two coats of paint. If the surface may have been coated prior to 1978, please consider the following lead hazard cautionary statement:Warning! Removal of old paint by sanding, scraping or other means may generate dust or fumes that contain lead. Exposure to lead dust or fumes may cause brain damage or other adverse health effects, especially in children or pregnant women. Controlling exposure to lead or other hazardous substances requires the use of proper protective equipment, such as a properly fitted respirator (NIOSH approved) and proper containment and cleanup. For more information, call (in the U.S.) the National Lead Information Center at 1-800-424-LEAD or contact your local health authority.