So a pawn shop i occasionally stop in had a massive set of ring gages. probably about 25 of them in a complete set between .5000 and 2.0000, problem being, that had a decent amount of rust on the bores. i've had some success repairing stuff with evaporust and then a short citric acid bath. curious if they are worth saving, to be used for rough gages after a quick ball or brush hone or if i will push their roundness to far out to be used for anything useful or if i would be better off using a dial bore gage setting tool with gage blocks. im leaning towards the latter, just tell me so i dont look at them again lol.