Rust Prevention

[83burban]

Hey everyone.

I saw a thread earlier about rust, and it got me thinking. My suburban has been a Cali truck its whole life until last year when I drove it to school. I was very good about power-washing the car (underside especially) since I know that salt makes things go from nice to bad very quickly.

Anybody have any tips for minimizing rust. Eventually (think 5 to 6 years) this truck will be frame off - but I would like to minimize the rust that accumulates in the mean time.

Are there any good products to use, coatings, etc for the undercarriage. The body has minimal rust, but there are couple cancer spots on the rockers now and I would like to prevent them from getting worse.

Thanks,