On the bottom of each door there is a rubber strip. If you look at the top of it you will see road dirt that has accumulated between the rubber and paint. Here in the Northeast that also includes salt from winter conditions. If not removed routinely this will promote rust and eventually rot through. I have contacted Honda but they are unwilling to help. It's a design problem and not fixable by adding mud flaps.
Come up with a fix to the dirt on the interior portions of all doors. Please before my doors rot off!