Last weekend my husband decided to spray some tinted waterseal on my deck. When he started to spray, my house near the bottom was covered in this waterseal. I was able to get it off immediately but after the deck was completed we realized that some of the spray had gone up against the house in areas that we didn't see at first. By the time we realized this, it had already dried on my vinyl siding. We've tried mimeral spirits and paint thinner but to no avail. Any suggestions on how to get this stuff off my vinyl siding without taking the color out of my siding?