take some very thin oil , like rem oil, or clp or kroil, and get some 0000 type steel wool, or that curly , big curls, sheeps hair type steel wool, put the oil on your metal parts, then rub it with the steel wool. Do not use any pressure; just the weight of the wool and your hand is fine; rub in circles. rub for a minute, then wipe away and check. keep rubbing until the rust spots are gone.