It is recommended that all of the peeling paint is scraped off in order to create a sound surface for paint to adhere to. If all of the paint can be removed, you can simply prime and paint the surface. However, if there is some paint that cannot be scraped off, you must seal the surface before painting. Failing to seal the paint that is still bonded can create peeling problems in the future when the original paint fails.
1. Remove as much of the peeling paint as possible by scraping or using a wire brush.
2. Throughly clean the surface to remove dirt, oil, grease, and other material that may interfere with adhesion. Wash the surface with a strong detergent, such as ammonia and water. Then Rinse the surface.
3. Sand the edges of the remaining paint to create a smooth surface.
4. Use a primer/sealer called Peel Stop made by Zinsser. Apply when the air temperature is between 50 and 90 degrees. Apply by brush, roll or sprayer. Back brush or roll to work the products into the cracks of the old paint.
5. If the peel stop dries to a dull sheen, apply a second coat.
6. After the surface has been sealed, prime the entire surface before applying your finish coat.
