for those of you with steel tanks...

[DRE]

I can't remember whom asked last night (Dan, GP??) at the gear night at SD&T, but the stuff you want to spray on your tanks where the paint has scratched off to the bare metal is cold galvanizing compound in a spray can, available at Ace Hardware (it's also known as rustoleum). Just remove most of the external rust, and put two to three coats on - it won't look pretty but it'll do the job.

Hope this helps,

David.