Yes. For water stains, first we check the drywall or wood to make sure there is not mold or current moisture. If the drywall/wood is currently wet or moldy, then we will need to replace it. If the drywall or wood is not moldy or wet, then we will apply 1 coat of an oil-based stain-blocking primer to the entire surface (if small ceiling/wall/piece) or 3 feet in every direction past the stain, if a large ceiling or piece. This will help prevent the stain from re-occurring. After waiting 24 hours for the oil primer to fully cure, then we will paint 2 full coats.