...Today @Sacto Mitch encouraged me to ask my tonneau cover guy about how to prevent this when I install mine. He apparently has the same problem...
This is more an annoyance than a problem.
I have a light colored car (Ivory) and a light tan canvas tonneau. But for some unfathomable reason, the tan tonneau is dyed black underneath.
Yeah, black.
Maybe someone thought that would make it more stylish. Are the Parisian couture houses showing a lot of black this year? I'm usually slow to pick up on the latest fashion trends.
What it does is leave black smudges on the doors and back deck and on the top of the (light tan colored) dash vinyl.
These come off pretty easily with a quick swipe of a rag with some mild solvent - not enough to hurt the paint - but it would be better if there weren't any smudges to begin with.
Maybe I should have waited until next season to get a tonneau. I hear tan is coming back.