I was wondering if you guys could give me some advice. I have a black sailcloth soft top on my Jeep and in a few spots I have some stains from that nasty red East Texas clay getting on there. How would you go about trying to get that out? I've tried hot soap and water with a rag and a brush, I've let it soak and I tried a generic all purpose cleaner... none of that did anything. I was thinking of trying simple green but I don't see why that would do anything either. Any ideas?