It's been a long while since I've been active! I don't know if y'all know about this product for dissolving rust, it's called "Evapo-rust" (I'm in no way affiliated just passing on information). It's pretty damn amazing! The pictures are of a an old diecast plane (1930's AC Williams UX99 I think) that I found in a freshwater pond 15 or 20 years ago. I'm an Auto tech and one of my suppliers wanted me to try it and this was my guinea pig.