I have three old lead bullets found by a friend with a metal detector at the site of an old military firing range. They are quite clearly old .577 Enfield bullets.Not rare or valuable but interesting all the same.
Over in the US there are a lot of these sort of bullets dug up at old Civil War sites so I thought there would be more experience in cleaning them.
As they came up from the ground they were just white lumps of lead oxide. I have scrubbed them with an old toothbrush and removed the loose corrosion but closer to the metal the oxide forms a hard crust.
I was going to put them in vinegar but thought I would check on here first.