kickstarter, gearshifter and parts like that can easily be done with a polishing wheel on a bench grinder in less than 30min. cases and cylinders are far more involved. oem cylinder especially because theyre very pourous and all the small pinholes have to be removed. homedepot has or used to have good stick polishing compounds in various grittyness. cant remember exact brand name but its in a blue tube. did a complete bike about 8yrs ago. forks, swinger, swinger linkage, complete engine, carb, shock. every piece of alloy was polished. first and last time ill do a project like that :miserable:. still got the engine but sold off the chassis. not into the polished bling anymore but if i was i would definatly send it out to someone else next time