Most finish failures start with the surface, not the product. Old coatings, dirt and moisture all stop a new finish from bonding.
Start with a clean, bare surface
Remove failing paint and stain completely. Patches of old coating under a new one will show through and peel first.
Let the wood dry
Wood that holds moisture will blister a new coat. Allow it to dry fully, and check the moisture content if you have a meter. Dry cleaning methods help here because they add no water.
Choose the finish for the location
- Exterior beams and decks: penetrating oil or a breathable stain
- Interior joinery: wax, oil or water-based varnish
- Heritage pieces: a finish that matches the original and can be reversed
Apply the finish soon after cleaning. Bare wood picks up dirt and moisture quickly.