if you put enough layers on... 3 i do believe (might not be legal by the way) it should be the same colour as the paint coming out the can ish. use a scowering pad on th lights first tho to get a ky for the paint to stick to. saw an escort at donny with the lights exactly the same colour as the car, looked very cool. you can have a garage make up some tinting spray for you, its your chosen colour plus a **** load of laquer in a can, i dont know wat proportion of paint to laquer tho. mine are tinted black, as my cars black and the look v.sweet. also when youve done put a good few coats of laquer on them to stop them scratching and what not, then just gve them a buf and a polish.
goodluck... oh and i hear if you spray thereflectors its illegal... although mine are sprayed and nothings become of it, come MOT time ill just swap the lights
if all goes wrong just get some nail varnish remover and itll get all the paint off, or just get new lights