I bought a razor on ebay and I have a couple of things to "fix" which I could use some help:

Rust - There were a few rust spots on the razor including the spine. I used a trick I found here about a ball of aluminum foil which worked great and got rid of the crusty part but what is left is almost a gray tarnish. I have been using MAAS on that spot. It's smooth now but still with the tarnish. Do I just keep at it with the MAAS? Will it eventually come out?

Pivot - there is rust at the pivot. I don't know how to get in there. So I have to disassemble the scales and work on it from there? As a result of the rust and a very tight pin, it's quite a bit of effort to open the razor. But I don't know how to unpin the scales. The scales appear to be in excellent shape.

Thanks!