Cold hard concrete
Masonite - if it's still being manufactured. Old school stuff.
I believe the thing you are looking for is a stainless steel workbench.
Woodwork mostly or metal?
Painted steel is pretty nice.
Used to have one that was a hardwood core in a dense fiberboard sandwich. It worked pretty well. The surface was rough so stuff didn't roll around. The hardwood core kept it from warping.
Oh yeah, I believe it will. Duh, the word "stain" in your post didn't register in my brain this evening. So sorry...It's for sure still around. I was checking it out today.
You sure it won't stain?
Nothing that conducts electricity for a work bench! NO!
Use plywood and replace it when it gets to beat up every couple years or so.
Corian makes for a nice work surface.
Whatever they make those school lab tables out of. I have forgotten the name of that stuff.
[fake Wolverine]
MMEEETT-TAAALLLL
[/fake Wolverine]