Thanks, Dean, but I don’t think that is it. I believe a pollisoir is used to burnish the surface and apply wax. What I am describing is a bristle brush normally used for painting (I think). It is dipped into a dry abrasive (pumice) which is used to dull the gloss shellac. Steel wool cuts surface to make scratches to lessen the sheen whilst the dry brush technique drags an abrasive powder along the surface.