I used krud kutter the must for rust. It did work very well. It is a spray on gel type. I let it sit for 30 min and washed it off. But yeah, major difference in what it looked like from the bush to now.
Today I also started unseizing the machine. I got the flywheel to turn but nothing else turns with it. Another mystery. Some of those small screws are also proving to be quite difficult to take off. I actually twisted the head on the screwdriver before it would turn.