Bringing old knives back to life is a lot of fun. I give them a good cleaning inside and out. Try not to go overboard on polishing old blades, try and leave as much character and patina as possible while getting rid of any active rust. I hate seeing old knives that are polished up to try and make them look new.You can sometimes get away with reprofiling broken or chipped blades while keeping mostly original shape. Give them a good oiling and they are good to go