Cotton rags over cardboard, on a glass-top computer desk I picked up for $5.
I can toss the cardboard when I'm done, without giving the wife a headache. (Not just complaints - actual headaches from the Hoppe's #9.)
The rags get saved. I bag them, and store them with my gun-cleaning supplies. When they're sufficiently dirty, they get turned into cleaning rags, and new ones take their place on the cardboard.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."