Answer
Mar 13, 2026 - 08:37 AM
Vermont Natural Coatings PolyWhey Exterior Penetrating Stain can be applied over oil-based stain or water-based finishes, provided they are lightly sanded first. For optimal performance, the surface must allow the exterior penetrating stain to penetrate the wood. If a significant film build of the original finish remains, the stain cannot effectively penetrate the wood’s pores.
