I use Tire Kicker on the tires, rubber, exterior plastic parts like the rocker trim and rock guards, wheel liners, window, trunk, and door rubber, (but not the gloss plastic like the tail lights), and all the under hood rubber and plastic. Put on a good coat and wipe off any excess. I think it does a fantastic job on all these areas, and it lasts a good while. It really looks good under the hood. Yes it's temporary but it does last longer than anything else I've used, and it's like magic on the brown intake tube. I have not had any adverse reactions from it either.
Just my two cents.