Some of these sound cool, makes me want to 'mess' with my three benches.
I don't want a metal bench in a shop because I work with electronics on occasion.
Last thing you want is a bench conducting...
Don't like cleaning spilled liquids off of metal bench.
Not too fond of rusting benches.
My original bench from when I bought this place in 88 I moved into the new shop couple years ago. Solid core door. You can get them places like Restore, or most used shops for a few dollars.
New they may be expensive, don't remember.
I've had engines, transmissions, and anything else you could have in a shop on mine.
Oil or liquids tend to make it heavier...
Another of my benches I stole Jack Olsen's idea, and is a fold up Plywood bench. I used 5/8 or so (odd number) Birch plywood. Never put a finish on it, now after two years of dirty car parts it's starting to assume a color.
This bench folds down right in front of cars on my lift, thus gets the worst of the worst abuse. Straight off the engine, onto the bench.
Totally satisfied with the plywood, no treatment, no extra cover, nothing.
If I ever damaged it, I could buy a new one for about 30 bucks.
Assuming I survived the damage because it would take something extreme to ruin it.
Third bench is just a Mac Tech 1000 with some of the same plywood over the top, plus a rubber tool box mat.
I keep that clean and don't put dripping greasy stuff on it, so it gets a lot less use. Also concerned about solder burns, or heat gun burns, so again it makes a much less useful tool bench than one I just slam anything I want onto.