https://www.eastwood.com/internal-f...ickedid=629947576078&wickedsource=google&wv=4
I used this on my LJ frame and inside torque tubes (neither have been patched, but same idea). I also fluid film inside both. Also did the same with my Trans Am while it was on rotisserie.
Actually, the top half of my frame that wasn't cut off had a coating of Eastwood's on it. The shop sanded it down a bit (for better adhesion) before applying the 3M product.