HOW TO PREPARE A PREVIOUSLY PAINTED WALL OR SURFACE
Posted by Denalt.ca in PAINT VIEW MORE TIPS & INSPIRATION
The following steps will help prepare your painted surface for a new coat of paint
- To ensure paint adheres well, wash the entire surface with a solution of water and TSP. TSP is a degreaser used to clean surfaces before painting. Wash walls from top to bottom to prevent dirt from spreading over to a surface that has already been washed. Rinse well with clean water.
- Repair wall imperfections with spackling or joint compound.
- Sand surface with 100-grit sandpaper. Do not use finer grit sandpaper, as the surface will become smoother than the rest of the wall and allow the repair to show through.
- Use a synthetic fibre 63 mm (2.5”) paintbrush and a quality 10 to 15 mm roller cover for easier application and increased effectiveness of Denalt products.
- Edge around walls, doors and windows, then immediately use a roller to cover the remaining surface. Before using a roller, it is recommended that you rub it to remove loose fibres and moisten with water to increase paint absorbency.
- Under normal application conditions, 1 coat of primer and 2 coats of paint are recommended. Primer adheres to the existing paint and seals repairs made to the surface of the wall. If a paint colour is very dark, primer can be tinted the colour of the paint you are using.
- For best results, apply paint at recommended temperatures and relative humidity levels. The ideal temperature is between 15ºC and 25ºC (60ºF and 77ºF). The relative humidity should be between 30% and 55%.