Thanks forwardonly,
I love WD40 and use it for all kinds of stuff, but I have been afraid to use it on my r/c car.
I use a tiny amount of wd-40 and a toothbrush ALL over my RC cars. I don't use it on the body, and never near the electronics, but on the arms, shocks, towers, body, gearbox, etc.... it cleans really really well, and makes everything jet black like brand new.