So, I just realized there is a 12 year corrosion warranty. Stupid me started some sanding and touchup paint on the front fender at the top of the wheel well on my wifes 06 wagon last year. was way overdue for a wash so I washed it and found many places rusting. door seams.. around the light at the top of the hatch. had the car in the dealer 2 months ago for a new parking brake module and rear brake job. Dealer didn't say anything of course. How should I go about this and what luck did you have?