Powder coating a 996 back wheel.

I got chain lube on the back wheel of my 2001 996 which i left and then laid the bike up for a year. The bikes now up and running again - thanks GTEC- but the back wheel is badly marked everywhere. Ive tried thinners, t-cut, petrol and cannot shift the marks. The rest of the bike is immaculate and the back wheel looks awful.
Does anyone know of any good firms in or around the Northampton area that can powder coat the wheel to original colour spec?
Any help would be greatly appreciated.