Presuming you have a Hyper 7 as said in your sig then all you need to do is what Chris does. Muc Off, let it work for 10mins, rinse off and use brush, coat in GT85 and let it dry. Simples.

Yea niggs i strip my cars down dont just chuck the whole thing in plastic and cf only...

A

i have been stripping the car down to its bear minimums but ive noticed that i am loosing screw due to the fact i keep taking it all apart and the holes become worn. i think i may eventually have to buy a new chassis at some point...
oh and guys i have a nitro not electric car haha :D