My two mischievous grandsons, dumped out a whole bottle of sunscreen on our nicely resurfaced concrete. Nobody noticed before it dried up into some sort impenetrable gunk. We tried soaps, goo gone, vinegar and ammonia. A power washer had no effect. I finally tried mineral spirits and that seemed to cut it some but May have damaged the stain. The best description I can offer is bubble gum. Im tempted to try freezing.
anybody have experience with this stuff?