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[Grayco]

I posted this on another forum but I believe it is good to put it here also.

I needed to clean up the feed drive slip clutch on a 20" saw I'm restoring.  I have been reading posts that suggest PB Blaster, WD-40 and even a mixture of ATF and Acetone for rust removal.

WD-40 is a great water displacing fluid and it does help loosen frozen parts but it does not dissolve rust.  PB Blaster is a great penetrant but also does not dissolve rust.  ATF and Acetone??? Well I haven't tried it.  ATF is really high detergent and acetone would certainly help penetrate.

I used distilled vinegar.  I soaked my rusty parts overnight in white distilled vinegar.  The next day I just brushed the rust away.  Even the chain links all loosened up.  After the soak and brushing, I hosed the parts off and soaked them in WD-40 overnight.

I am very impressed with the results.  My only concern is the need to neutralize the vinegar to avoid future corrosion.  So far it looks great!

[Ranger_Dave]

That's looking nice.

I'm restoring a 1939 Ford 9N tractor. That's 77 years of rust. For some of the smaller parts I use electrolytic rust removal. Works great!

http://www.instructables.com/id/Electrolytic-Rust-Removal-aka-Magic/

[hummingbirdstones]

Use a solution of baking soda and water to neutralize the vinegar.

[Grayco]

Use a solution of baking soda and water to neutralize the vinegar.

I considered that, but then you need to neutralize the baking soda.  I just settled for a good water rinse and wd-40 to eliminate the water.

BTW... WD stands for Water Displacement and 40 stands for the 40th formula  https://en.wikipedia.org/wiki/WD-40