The paint is pretty worn on the corners of the machine, but I would consider it more wear and tear than anything. There is a rust spot on the lower left side of the machine (see picture). The chrome slot where the drinks are vended has a crack where the metal was originally put together, and I epoxied it to keep it from spreading (see picture). The C on the Cavalier emblem is missing (see picture).
There is some slight surface rust located on different parts of the machine, but again, I feel like this is primarily wear and tear. I feel like this machine is in incredible condition considering it is 55 years old.
I personally would not do anything to the machine, but plug it up and enjoy it. The item "ANTIQUE CAVALIER C-55D VINTAGE 15 COCA-COLA VENDING SODA POP COKE MACHINE" is in sale since Saturday, December 17, 2016. This item is in the category "Collectibles\Banks, Registers & Vending\Vending Machines\Soda". The seller is "brooksvilleboy" and is located in LaGrange, Georgia. This item can't be shipped, the buyer must pick up the item.