PENOFIN 1ST STEP PREP EXTERIOR FINISH: ~~ 1st Step Prep is the ideal way to ensure deep penetration of Penofin's amazing natural oil finish formulated for hardwood. 1st Step Prep cleans, brightens and reduces the hard mill glaze found on most hardwoods. This allows Penofin to penetrate deeply into dense wood species for ultimate protection and beauty. ~~~~~ FEATURES: ~~ Natural oil finish hardwood formulation. Opens the pores of wood surfaces. Cleans, brightens & eliminates hard mill glaze. Allows Penofin Finish to penetrate into dense wood.