u wnt some of that stuff with a black colour in it, for starters, then u just need to look after it! i'm not sure what other brands do, but workin for motorworld, the onyl one i ave in my excuse for a branch which has black in it, is a carplan one - under t-cut name i think but i cnt say how good it is, as i generally shy away from carplan/t-cut
my bumpers were grey when i got them, and i've used the green autoglym bumper care, gave it a good treatment and buffed it off a few times so it had lods on, and gradually its come up a treat!
