We have just had a bluestone patio installed - the men who did it know their stonework - however, they were clueless on the sealers - they have sealed it with an INTERIOR Water based acrylic - Some places around the grout joints have too much on them and when they are wet (it is raining now) they turn milky white. Would you suggest stripping those areas and resealing them - the other part looks okay - maybe I should just wait a couple of years - hope it doesn't get too wet and reapply something. I spent all day scrubbing an area off with CLOROX (believe it or not - it worked), Acetone, Paint Thinner and a stripper to be used for that kind of sealer (which did not work at all). The acetone did the best. Many thanks.