Yesterday I re-tuned the bottom of my MF #9 to remove a very slight depression in front of the mouth, taking it all the way through 320 grit. The entire sole is very flat now and the tool FINALLY takes a full width shaving. Im really excited and pleased. (Got motivated to try again after following Kees' "Sacriledge" thead last week.) Now Im trying to figure out how to keep it from rusting.
I tried mineral oil previously. It works fine on new tools like my block plane. But it doesnt seem to work as well on my old planes. I quickly get a very light film of what looks like rust - so thin its almost a discoloration. So yesterday, I carefully waxed all my new and old planes with Johnson Paste Wax, after searching the archives for another solution. This morning, the old planes are showing that rust-like film again.
I recall that new planes are a different metal compound than old ones (ductile iron?). Im guessing thats part of it. But Im wondering:
1) Does anyone else experience this rapid oxidation, rusting or whatever it is, on your old tools but not your new ones?
2) How do you prevent or at least reduce it?
Thanks in advance guys. Have a very Happy Easter!
Fred