From what I saw of my "rocker rust-out mayhem" the 2 front drain hoses sit in the front door hinge area, as you said, but the hose was soaking the sound-dampener material on inside of fender/wheel well area, if I look behind hinges when door open you can see the big wool sponge. And im not too sure if pass side front hose was leaking onto dampener or not, but it was for sure major contributor of rust problems. In all areas near and around the hoses the rust is by far the worst. There could be and im sure there are other factors at play here, but I was shocked to see this drainage system. Living in PA with all the road salt doesn't help, i'm trying to figure a different route for hoses, was thinking out bottom of rocker maybe? but I don't want anywhere that can fill and clog with dirt/mud, suggestions anyone?