I understand that if you use the correct "thinset" you can tile over old floor tiles that are in good shape but I am doing a kitchen and want to know if I can do the same over the wall tiles over the countertop. I have the standard 4 inch "shiny" ceramic tiles. Can I leave them there and sand the glazed tiles until they are "rough" ? There is a new baby upstairs and we want to avoid banging off the old tiles ,if possible, unless someone knows a "quiet" way to remove the wall tiles and sheetrock. I know I don't. I would appreciate any help with this. Thanks