Well I'm in the same boat, used fairy power spray but as the gun had been sprayed green, then black then green again, the power spray didn't really do much. So my plans are to sand down the parts, primer them and then a couple of coats of black and then a final clear lacquer to stop chipping etc. prep work is the most important part tho, don't just do a quick sanding, take your time and do a proper job.