Years ago I started spraying my frame with used engine oil mixed with kerosense, and also white lithium spray-on grease, to stop the spread of rust and prevent new rust from forming.

I just posted a write up about this on my 4WD blog. Any thoughts on this process?

http://4wdtraveller.blogspot.com/2007/05/controlling-rust-spray-it-on.html

DGH