I have a 2001 Jeep Wrangler with internal frame rust and rust thru on R/H rear trailing arm support. Heavy rust on rear spring mounts. I plan to have frame and under body sandblasted rear trailing arm repaired. I have ordered 1 quart of each – rust converter, rust encapsulator, internal frame coating, extreme chassis black (satin), and pre painting prep. Also ordered under coating gun 20441. Should this be enough to do the job well? Any advice on usage of products ? Will the gun work with all these products?