Category: Using Exterior Paints
There are different solutions for each of these problems.
- Staining caused by rust from old nails should be rubbed down to remove the rust, then prime any exposed metal with a good metal primer before painting.
- Resin bleeding from knots in wood should first be removed with turpentine. Then seal the knots with two coats of a suitable knotting solution and repaint.
- All solvent-based paints such as gloss will discolour or yellow with age. To treat, wash the surface thoroughly with detergent solution, rinse with clean water and allow to dry before repainting.
- If the wood appears to be dirty, particularly around glazing rebates, it may be affected by fungal growth. Clean the surface thoroughly and treat with domestic bleach, or a fungicidal wash, before painting.