I've had quite a successful go at polishing up the alloy adjusters on a 2nd hand pair of Hagons to a near mirror like finish by making an adaptor to fit and putting them in a drill chuck, then using valve lapping paste and wire wool/solvol. Would I be able to get the same sort of effect on the engine cases? I cant afford to send them away to have them professionally done, but like what Ive achieved with the shocks, so was wondering if anybody else has had a go and what you used.