Restoration Caucasian Dagger - Removing Century Rust

Hello folks! You haven’t seen such a restoration yet! I managed to get a unique Georgian dagger of the Caucasian type, which has been underground for a very long time, I guess (after checking the stamp ~ 150 years). I was told that it is impossible to restore it, it is already dusted, but I have a different opinion. Well, let’s start restoring this unique blade! Firstly, I removed huge layers of rust with a spatula. All the metal of the dagger has turned to rust, but there is hope, the century rust was falling off the blade, it was very surprising! Next, the dagger placed it in a jar together with a rust remover. A few hours later I took it out, washed and dried it, but the rust remained. Via iron brush, I removed the remnants of rust from the blade. And even found the stamp of the dagger! Rust has damaged the cutting edge very badly. I had to sand it off, due to the thickness that remained could be mm. Further, I welded all the holes that were on the blade and