Yep. True rust issues start from the inside of the body panels…rockers, fenders, doors, rear hatch, and cab corners of trucks etc. Salt water from driving on the roads gets in all those nooks and crannies and never gets washed out, no matter how much you go through the car wash or spray the underbody.
I bought my power wagon brand new, and have applied fluid film to the entire underbody, as well as inside the the rockers/cabcorners/fenders/doors etc. using a small flexible wand/spray gun that i purchased online. She just went through her 8th northern michigan winter…no signs of rust yet!!!! Put her up on the hoist and spray away!!!
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