Looks like it's cleaning up OK. Others have better ideas than I do to help take care of the finish.
I found a Kennedy workbench I re-worked. It was set outside by the curb in an industrial warehouse district, so free. It was obviously assembled by an
"I know what I'm doing, I don't need to read the instructions" person, I assume to be male, but I dunno, nor do I care. At least they didn't start cutting things
"to make it fit."

I looked in CL & ebay to see if there was anything similar, and I found one for $500 asking price, not asn nice as mine after I added my mods. The 2" X 4" framing made it much-more sturdy.