Underbody rust prevention?

I recently got a service (http://www.pakenhamchryslerjeep.com.au/owners) on my 2000 wrangler and they said I have "a touch or rust on my under-body, nothing to worry about".

I take it down the coast about once every month and go camping on the beach. I was wondering if anyone can recommend a prevention spray of some sort that will help prevent any further rust?

I do wash her after each each trip but I guess I cant reach some spots :rolleyes: Any help would be greatly appreciated!

. If you want to fix it before it gets worse, you can have it undercoated. Undercoat is generally a hard rubber material when dried and a lot of off roaders use it. From past experience, spend some money for it and look up reviews for the product. I wouldn't go buy a $1 rattle can and use it, wont last long. I've been told that 3M makes a good one to use. You may even call a few body shops or dealerships and see what they recommend.

I've found that Krylons rust prevention spray paint has been working for me and our 08 Wrangler.. thos it is suggested that we retreat every 2 years or depending on how bad the rust may be reoccuring. Not that the paint doesn't work.. in fact the last time I sprayed this on the jeep's frame.. it ate the rust away, creating a paintable surface thereafter. I'm looking forward to doing a better job this year and hope to document the whole procedure afterward.