My Dad had been keeping these Old Timer folders in his safe along with other miscellaneous stuff we found after he passed away. Was curious what you'd suggest using to help remove the rust particularly in the grooves where the blades fold in. Soak in CLR? Vinegar? I was able to use my Dremel with a wire brush then buffer and get the blades cleaned up pretty well. No plans other than getting in better shape then back in the safe. I've got a 2 blade he gave me years ago I keep for EDC or using in the shop.