Hey peeps, how do you contend with localized body rot? I'm speaking of the put-your-finger-thru variety. This is on the right rear corner of a Suburban "86" and continues to the nearest window corner.

I think this is where the rear A/C suction/liquid lines route and they cause excess moisture here.

I want to completely revamp this vehicle. Blueprint the engine, turbocharge it, convert to electronic fuel injection, leather the upholstery, etc, etc. But if I can't solve this rot spot I will have to put this noble steed down. <shudder>