Nice score. You got it for less than the price of a 6-pack of beer.
Does the press ram sit 90 degrees to the table top in the mounted position?
I would sand blast the tan painted parts and the handle but not the linkage or ram. Looks like the linkage is blued. I'd keep it like that and probably blue the handle as well. Re-paint the tan metal parts using a good primer first.
I agree, not an RCBS press, maybe a Pacific.