Just a quick aside on the issue of painting over rust. I replaced most of the rusted out areas on my car with new metal, but I needed something to coat the remaining areas (surface rust). I considered POR-15 because all the reports seemed very positive. However, I was put off by the need to overcoat it to prevent UV damage (this from the mfg instructions). I decided to try the Rust Bullet that I saw advertised on THIS FORUM. I gave it 2 coats (per mfg instructions). I put them on back-to-back, with about an hour drying time in between, using a very cheap brush (on the undercarriage), which I then threw away. The next day it was the hardest painted surface I've ever seen. I could hit it with a hammer (which I did to take out some dents) and it hardly showed. I recommend it. Wear gloves and old clothes, because if you get it on you (which I did), it takes DAYS to wear off -- it is REALLY tough stuff.
LanceB