I posted this to the detailing forum, but I'm not sure how many MCO members check there, so here it is once more:

<<I've got a couple of pretty good scratches along the top of my PS/B MINI's back bumper- picked them up while loading music gear in and out. The touch up paint doesn't help- I've got one of the AutoVisual pens and it's for metal. I've tried a couple of other products for scratches as well and again, they don't seem to work on the non-metal surface. Anyone have experience/know of products for touching up the vinyl surface back there?>>

Cooper4us mentioned Langka, a paint touch-up product. Anyone used it, and does it work on vinyl?