dinger, could you elaborate on what kind of problems I'd face? Some things I could live with or put in the effort to solve. I'm not in "most places"... would rather do a proper rust fix even if it turns into a project.
OMT, I like the idea of spraying the interior with some oil, grease, paint, rubberized coating... but I have two hesitations: 1. Lots of people happy with them initially, but not a lot of long-term reports. 2. Hard to undo or redo in the future. What's Corroseal like, in your experience?