Shale Interior Plastic Paint

Yes I did a search to see if I could find the answer but I couldn't seem to find what I was looking for. I know SEM products makes awesome leather paints and such but does anyone know the paint code, brand or anything to touch up the Shale colored plastic in our trucks? I have some spots that need touched up because the paint is peeling off for some reason. Has anyone did this and had good luck with a specific brand and a color I should be looking for and where to purchase the product. Thanks in advance!!