What does one do for 10 year old GM vehicle that seems to have a rusty underbelly.
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The most important thing is the quality of the application and at least annual inspection of the underside to make sure all is well. Keep all the weep/drain holes clear so water doesn't collect anywhere. I have a Ziebart dealer that does awsome work but if I couldn't take it to someone I trust I would try to do it myself. Many places do a poor job from what I've seen.
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I see THESE electronic rust inhibitors being advertised at Canadian Tire in Canada, anyone had experience with them ??
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My choice is a good car wash on as regular intervals as possible during the winter.