I have tiled less than one wall and noticed some scratches on the tile edges, probably when I cleaned off the excess adhesive. I don't tile often, so as I got better, I kept the adhesive behind the tiles! What should I use to polish it off? Also, will I scratch them when grouting? I'm using mapei ultracolour plus CG2WA, I cannot see anywhere if it is sanded/unsanded grout? Installation guide (not read before now) says these tiles require sealing with a polished porcelain sealer before and after fixing! Any advice?