Thread starter here, I'm reviving this thread because I still haven't decided whether trying to address the underbody rust of my '03 is a workable project. Several responders have good things to say about POR 15, but since that product is not readily sprayable I don't think I could get anywhere near full coverage. Getting underneath is not too much of a problem, as my garage has a lift. But I don't see how a brush will do a thorough job.

Anyone out there have any experience with the Eastwood line of rust treatments?