took it to a metal finisher and they did it on there machine. you could do it with a polishing mop on a dremel, will just take a bit longer.
get some nitro mors to strip paint. them rub down with wet and dry, using finer grades each time. i got some 240, 600 and 1200 from
www.aruncas.comthen took too local finishers and they mirror polished for £10