Mark sprays shellac on his guitar tops to protect it during his construction process. After pore filling, he sands the back and side to only leave residual epoxy in the rosewood pores. Mark sprays on vinyl sealer onto the back and sides to prepare them to accept nitro. When he applies the vinyl sealer to the sides, some overspray always ends up on the top but it is protected by the shellac. He leaves the shellac on until the back and sides receive about 6 coats of nitro. He then sands off the shellac and vinyl sealer overspray from the Italian Spruce top and does his final thinning/tuning of the sound board (if needed).
