Is there a way or is it good to paint inside longs Options

[wayne1234]

Well most know I have been doing alot of rust repair, and I have gotten near the end. The hell hole has been replaced and motor mount. and long material behind the motor mount... I used weldable primer on the back side of the metal. But I'm guessing that after welding there has to be some burn off. leaving some unavoidable exposed areas inside the longs.. some one had mentioned this in my rebuild thread.. and It got me thinking. What would be suggested to treat or coat the inside of the longs, then maybe paint them? I'm picturing a long wand like maybe a Ziebart rust proofer would maybe use? make a acess hole in the front of the long and spray around in there and around the heating tube as well? could you use phosphoric acid wash first then rinse then maybe a heavy rustoleum coat? the excess would come out the drip holes? looking for ideas. Thanks for all you input

[charliew]

If you ever put por15 over rust and it ever gets ANY moisture it is a place to rust worse than if it was open to the air. It will encourage rust through. I have found wax in cavities that has been there a long time and it is still working great. The thing is nothing washes it off because there is usually no direct pressure on it inside a cavity. Now when it is on the inside and the panel is welded to it is gone in that spot and the rust will start at the weld and go out and sometimes go under the wax. Using body plugs is better than not using wax.