Dan, I have been using this product called "Free All" made by Federal Process Corp. Cleveland, Ohio 800-846-7325,
www.freealloil.com
. My shop is a marine repair shop and this product frees up rusty bolts and nuts like no other product I have come across. It also dissolves the salt build-up around fasteners that we deal with out here. My friends who are in the same business as I, are now using this product and are having the same amazing results. You may already be using a similar product but you may want to give this a try, as well. Thanks for your great channel. Your testing procedures overlap our business as well when diagnosing CAN lines and sensors and the like. Thanks again and keep up the great work. John Hager - Southworth Marine Service LLC. (360) 871-5610.
