Testing cleaning techniques for sewing machine hardware

Part 2 of the Vintage Sewing Machine Garage's series on cleaning antique sewing machines.  Here, he tests various cleaning products on the metal hardware (e.g. cover plates, clutch knobs, hand wheels, etc.).

Cleaners tested in this video:

• sewing-machine oil (the VSMG's favorite all-purpose cleaner)
  
• isopropyl alcohol (but be sure to remove the metal part to be cleaned and do that separately -- do not get alcohol on the paintwork!)
• polish made for automotive metals, specifically Mother's Mag and Aluminum Polish (found at automotive stores, etc.)
• hand cleaner made for grease, oil, etc. in a non-pumice formula, here specifically MotoMaster Hand Cleaner
  

Note that all of these products seem to do a decent job of cleaning dirt and oxidation from the metal pieces in this video, though as expected, sewing-machine oil -- because it is the gentlest of the four -- will take repeated applications.  ("Your results may vary" -- and always test in an inconspicuous place first!)