I would recommend a "urethane fortified" industrial paint like Benjamin
Moore M22 for your topcoat. This is easy to apply, is pretty tough and
resists oil stains. I used it on my lathe and it has worked well. I would
use whatever matching primer they recommend for this paint. If you are in
California you have to use the CM22 version, which takes a little longer to
dry.

Good luck-

Paul T.