My grandfather is finally ready to give up his luger after storing it in an attic for 50 years and I'd like to take care of it and fix it up. How could I remove the rust from the gun. also I would like to buy some bullets for the gun, what size round does the gun take (I don't have a gun permit, do you need one to buy bullets in NJ). thanks for any help you guys can give me. I don't have the gun with me but if I do get it then I will post the serial number.