After the old soundboard is broken out of the piano, a fair amount of wood and glue residue remain. The rim gluing surface needs to be cleaned in preparation of installing the new soundboard. Chisels are used to remove the large pieces of wood residue with extreme caution so that the original rim surface is not damaged. Then the surface is soaked with a special water solution that softens the old glue so that it can be scraped from the rim glue surface.After this process is completed, the rim is left to dry overnight after which the surface is lightly sanded and any repairs that are needed are done.
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