Agree with Midwaste.
Use press wash, and lots of paper towels. I wouldn't use a power washer just because you just run the risk of rusting stuff.
Press wash will remove plastisol ink, spray adhesive, and most messes that you will encounter on a press. I cleaned mine thoroughly when I first got it (wasn't that bad), but then went a step farther.
I hit all of the powder coated surfaces with turtle wax polishing compound, then waxed them. While it won't last forever it will help keep the dust off, and make it easier to clean up. I'm pretty sure press wash will cut right through the wax but the polishing compound leaves everything super smooth.
A little neurotic perhaps, but a well kept machine will sell easier when you upgrade
