I got this press release from Einszett NA today about Einszett Plastic Deep Cleaner:

A non-caustic, water-based detergent cleaner used to clean all interior plastic surfaces
such as armrests, steering wheel, dash, shift knob, pedals and door sills.

- Remove stubborn grime build-up body oils ,sweat, dirt, and food
- Remove scuff marks on door sills
- Leaves a shine-free,dust-resistant finish

Other uses:
Clean tires prior to applying a tired like einszett Vinyl-Rubber Care
Protectant for better adhesion.

Remove tar from exterior painted surf

Spot clean grime and oils on interior carpet surfaces (NOTE: spot test fir
color fastness)

 

What about to use this on colored plastic bumpers, like on the Volvo station wagons?

 

you can try on a small spot I use it on the older volvo trim black trim and it works great, same as the mini cooper and bmw ones.