I just finished my first tile job and am really thrilled with the way that it came out. Except there are a few areas that I guess that I just didn't clean enough and now there are spots of grout and/or mortar here and there. My tiles are tumbled marble, I used tri-poly unsanded grout and a multipurpose thin-set mortar. I tried scrubbing with a scotchbright pad but it isn't doing a thing. It has been dried for about 48 hours now. Is there any chemical I can use that is appropriate for marble?
Any help would really be appreciated! Thanks! Diana