Thankfully Squeak, this thing hasn't been shot for 50 years or something, the weapon is in 3 pieces now, the barrel is very corroded.

The lock mechanism (trigger etc) was very corroded also, one friend of my father did something like dumping it in a tin box with diesel fuel mixed with engine oil and heating it up, or some other alchemy and it came up much better looking.

The barrel is very long, the whole weapon is about 6 feet long (I'll try to post a photo where my wife holds it, she is shorter than the weapon!).

Do you have any idea how can we get rid of the corrosion?

Ahh, by the way, do you happen to have a Skype account? Last time I enjoyed talking to you but I didnt have a camera, I have one now.