There is a product available that will loosen silicon. Check out the following web-site for information:
For some reason the above site is not responding at the moment so let me know if you have trouble reaching it. I was able to get answers to my questions at the following email address:
Pricing was quoted to me as follows:
The container sizes are as follows: 1 quart is $30.85
1 gallon is $47.85, 5 gallon pail is $189.25, and 55 gallon drum is $1696.75.
I bought 1 quart and found that it does work. I had some areas on the exterior that had lots of silcone gloped on. Some of it I removed as much as possible first and some I didn't. I brushed on the Amtex CCR and waited about 15 minutes before I started rubbing. The residue from the mechanically remove silicone pretty much all came off. Much of the larger glob, while not fully disolved had at least loosened from the aluminum enough that I could get most of it off easily enough. Waiting longer would only result in better results.
I hope this helps,