My clients have a problem with their patio stone. It seems to be some kind of terra cota paver.  When it was installed, the installer finished up by sealing with a home depot product.  What bugs my clients is that when it gets wet, you can see exactly how far the installer over-applied the sealer. (In some areas, 2 inches beyond the grout lines.  Maybe he just happened to have a big brush that day, or maybe too much beer the night before?) You can see this plainly in the attached photos.  I wet the pavers and this becomes readily apparent.  I tried taking it off with dimethyl chloride (Aldon's Premium Stripper) and I had marginal results.  If I can't remedy this problem they will probably tear it out.  Any ideas?
Stuart Young
Santa Fe Floor Care