We had a very bad experience with our quartzite install. 2 of our 3 slabs were sealed with swipe marks and moisture in them turning them brown. We fought a good two months and they finally replaced them. We are left with our island piece that also has a spot of moisture and a partial can ring from their sealer being sat down. The countertop has been stripped 5+ times, poultice has been applied but nothing is touching it. Can anyone help me get this removed?!!!