Join Date: Jul 2008
Location: Fort Collins, CO
I don't know how to remove the stuff you have in there, but I know that I used Red-Kote to line my tank just about a month ago. I can't find anything bad about it like I did the rest of the tank treatments. It is red and is easy to see if you coated well. I had a leak at the weld where the front left mounting tab is and it sealed it up real well. Just make sure the tank is 100% dry before using.
If you want more information, let me know I can tell you anything you might like to know. Also, it is nicely priced at $35 on Ebay with free shipping from a guy in Florida.