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Last winter I left my DFMT inside my egg but never closed the bottom vent or put the ceramic top on for some reason. Alcohol may have been involved. Anyway my egg was nice and clean but it also burnt everything off my DFMT which rusted up in not time. A couple of days ago I decided to restore it using electrolytic rust removal.
Now this is way over kill for this application, the first time I tried this I was restoring an old hand plane and this method causes no damage to the good metal, it only removes the rust without damage to whatever you are restoring. Instead of baking soda I used this, pure sodium carbonate.
Here the rest of the process.
Stealth applewood score.