Many thanks to our shop owner Mr. Jude Reveley for the instructions and letting me practice. The soundboard is refinished with sanding sealer and top coat. Here we use polyurethane for sealer and acrylic urethane for top coat. Both sides of the soundboard are sprayed with sanding sealer, then only bottom gets top coat. The bridge side will be sprayed with final coat after bridge top is milled to ideal height, notched, and bridge pins installed.