Ensure that previously painted surface is sound by conducting an adhesion test. To do this, cut a small X through the existing paint with a sharp blade. Press cellulose tape firmly across the cut and then rip the tape off. If the paint comes off, it is unsound and should be removed. Repeat the adhesion test at random across the painted surface, to thoroughly test the soundness of the area. If you are unsure that the substrate is sound (dry and undamaged), please contact a qualified tradesperson. In addition, please remember that the product information provided here is to be used in conjunction with the recommended product label instructions. Once an adhesion test has been conducted, property owners can determine which parts of their homes can be repainted, and which areas require surfaces to be replaced. Here is some quality advice and product recommendations to successfully painting both weather affected surfaces and also brand new surfaces.