Came upon this thread - I have a 2013 Fiesta where my right rear wheel well has rusted terribly. It seems the cloth liner is just making things worse, and more pressingly it's in the way of my attempted repairs.
The car is old and already at 183,000 kms.
Is there any real risk/downside to just removing the one liner and spraying inside the wheel well with a rubberized coating?
The car is old and already at 183,000 kms.
Is there any real risk/downside to just removing the one liner and spraying inside the wheel well with a rubberized coating?
Anyway regarding your question, have to use a layered approach. In my experiences with my prior vehicle the undercoat is good until there's a breach. The undercoat then holds the moisture beneath. Address surface rust. Etching primer, primer. Thick layers. The 3M undercoat may be best. Then use the wheel well liners but make sure they're properly secured.
https://www.feoa.net/threads/upper-strut-mounts-lasting-12-months.117467/post-1123300
Much of the ass-end of my prior car was rusted out. But no one could tell just looking at it because the OEM undercoat was still intact. I could tell by knuckle-knocking around back there with my fist. Oxidation processes accelerate when the materials are exposed to higher concentrations of oxygen. (such as liquid H²O) Heat also accelerates the oxidation process.