JHZR2
Staff member
This is specifically in the door of my 96 Ram. I had the door card off when I was looking at how to push out some of the dent that was there when I bought the truck.
When I opened it up, I used some of the RP-342 heavy cosmoline. It has been a few months, and sitting outside. At the same time, admittedly the window squeegee on that side isn’t great, and doesn’t make a tight seal. So water does drop into the door.
Taking a close look at where the water seems to drop and sit, I saw this:
The orange-red color is NOT rust. The whole inside was black before I sprayed the product. This was some sort of delamination or reaction with standing water. The failed product will come off when touched, in orangish-white bits.
This is an interesting outcome to me. Years ago I used amsoil HDMP on certain spots on my Saab, and I observed rust growth under this coating in one or two places. While that was outside and perhaps not sufficiently thick, this was, I think, applied to a good thickness.
I’ve used this when I had the door card off on my 82 MB 300CD. It had some wax on the vertical sections of the panel interior from the factory. But not a lot at the seam.
I think cosmoline is good for well drained areas, and locations that see incidental contact with moisture/humidity/water. But something else is up here...
When I opened it up, I used some of the RP-342 heavy cosmoline. It has been a few months, and sitting outside. At the same time, admittedly the window squeegee on that side isn’t great, and doesn’t make a tight seal. So water does drop into the door.
Taking a close look at where the water seems to drop and sit, I saw this:
The orange-red color is NOT rust. The whole inside was black before I sprayed the product. This was some sort of delamination or reaction with standing water. The failed product will come off when touched, in orangish-white bits.
This is an interesting outcome to me. Years ago I used amsoil HDMP on certain spots on my Saab, and I observed rust growth under this coating in one or two places. While that was outside and perhaps not sufficiently thick, this was, I think, applied to a good thickness.
I’ve used this when I had the door card off on my 82 MB 300CD. It had some wax on the vertical sections of the panel interior from the factory. But not a lot at the seam.
I think cosmoline is good for well drained areas, and locations that see incidental contact with moisture/humidity/water. But something else is up here...