I need fo find ? A chemical rust removal, my door seams need work again to remove rust, sanding down the seams, primer and paint are not working, I all ready did a patch on my driver's fender that had completely rusted out.

Why dodge why?

So to be proactive, I need to know what works..that I can buy at a candian tire, auto value, nappa ect..

Would gravel gaurd, or a line x coating be enough to stop or prevent rust after its removed?

Im so grateful for the money dodge is taking from a new truck to reinvest in my 06.