Can you use paint that is chunky? Paint is “chunky”: Paint that sits for a long time will settle, so you’ll have to stir it properly before beginning to use it. Paint that has chunks in it–perhaps from freeze/thaw cycles, or rust from the can–shouldn’t be used. However, some sources suggest straining or filtering the paint could prolong its life.
Why does paint go chunky? Chalking occurs due to ultra violet (UV) radiation from sunlight interacting with the constituents within the paint film. Over time UV degradation of the binder or resin within the paint film will allow the exposed pigment particles to become more loosely bound to the surface. A powdery surface is the result.
How do you fix chalky paint? First, you’ll need to clean away the oxidation. Again, you do this with detailing clay. Then, you would restore to a shine by polishing. Heavy oxidation (recognizable by a completely dull, chalky surface) is likely beyond complete restoration.
How do you cure chalky paint?
- Wash the chalky surface clean using a power washer and a mild dish-washing soap.
- Wash away the soap using fresh, clean water.
- Seal the exterior paint by applying an acrylic-based primer.
- Apply two coats of an acrylic-based, exterior paint to the house.