It is recommended that a primer base should be applied over top of the sanding sealer for better adhesion of the base color coat. Also, primer will reveal any flaws in the body that may have been missed. Ohio Valley Nitro offers a full line of nitrocellulose finishes in 16oz. (12oz. fluid) aerosol spray cans. They have designed this product to be used by the first time guitar builder to guitar manufacturers. Each color has been specially blended to match the original color used by the guitar manufactures. The contents of each can is pure nitrocellulose. Each can has enough material to finish at least 1 guitar comfortably. To ensure professional results we suggest using this with Behlen Vinal Sealer and Stringed Instrument Lacquer.