Restoring plastic

I've tried a few different products for restoring the plastic and rubber parts. The cockpit sprays and cleaners work great on the rubber parts, but nothing seems to clean and restore the black molded plastic.

This is after trying a few different products. I did some searching and found an interesting video on Youtube about using peanut butter. No joke. So I took this part off

Got a rag and some creamy peanut butter

And wouldn't you know it, it works like a charm

So obviously this isn't going to repair any scratches or wear, but at least it restores the color of the plastic.

For a couple $$ it's a pretty nice result