Lubricants and penetrating oil
Candle Wax to Loosen Rusty Nuts a Myth or Hack? Let's find out!
His winner
Sea foam
It provided thorough penetration and required significantly less force to break the nut free than candle wax
Everything he tested
Results were read from the video's captions by two AI models, and only the numbers both agree on and that he says out loud are shown. Some results appear only on screen in the video. Check the video before you buy.