I think the dense thin type would do the job the best.
I was thinking of making up a divider plate to run down the middle of the chamber, and drilling some large holes in that, and running a pack on each side. That way one side would take most of the oil out of the air, and the other can clean it up a bit more. Being oil vapour, some is always going to get through, but if I can take the majority out of it, then that would be good
Then when it comes to clean, 4 screws out, pull the steel wool/stocking out and replace with a new one - easy
At least in theory it should work...........