Not shure about the right name for these parts, but they go horizontally under the side window glass. They were faded, cracked, scratched & one of them was startin to peal.
This picture shows all of tools I used.
I sanded away most of the cracks & scratches. Used sandpaper 340, 800, 1000.
The one in the picture was the worst shaped one, with a pealing plastic. What I did is that I lifted the black rubery coating & applied fiberglas under, then wrapped that part with tape so that it would stick. Sanded the part, applied more fiberglass & so on.