Hand Plane Restoration
Go to YouTube and search for “restoring hand planes”. You will find quite a few videos. The *most* important thing after you remove all the rust (using Naval Jelly or Rust Free – there are other products as well) is to flatten the bottom and true up the sides. The videos will explain that process – start with Chris Schwarz’ video (https://www.youtube.com/watch?v=RlYDipD_5s4). I have done several planes this way and if you’re willing to put in the time and the elbow grease, then you can have a good, workable plane. Good Luck.