I did something with these two machines that does not come highly recommended - we took a bath. Yes, I did some research on doing that first. :) After I stripped them both of all their large removable parts, we went out to the hose and I washed them completely down and then dried them completely with the hairdryer and re-oiled them. I was careful with making sure they got completely dried, but the oil will also help prevent rust from any water I may have missed. Needless to say, it's not recommended that you do this, but these were just so filthy.
The oriental-style decals on this machine are still in lovely condition
A view from another angle
Now to finish oiling and re-assembling Treadle 1!