In the past, I've tried just about everything I could think of to remove silicone with very little success. But, I've found that regular old gasoline, when applied and is allowed to soak for a bit breaks down the silicone and allows it to crumble so that it can be removed. I've also had success with Mekanica silicone remover that I bought at Ace Hardware. It's a little slow but will eventually remove the stuff. I also understand that Permatex markets a silicone remover but I've never tried it. Good luck with your project, you've got a mess on your hands!