I took the bed off of my 1950 truck, since the bed is off I wanted to do some work on the rust on the frame. I will not be taking any part of the cab off, but can crawl around under there. What are thoughts on just painting everything with rust converter paint? Or do I need to sand all the rust off. I'm sure that sanding it and then painting is the best, but is the rust converter a good stop gap until I can pull everything off the frame? Also, any worry with the rust converter damaging something? Should I make sure I keep it away from certain areas?