[Zeke]

You can clean up the oil deep enough to get a good bond on your new coating. The key is to neutralize the lime in the concrete with the acid and provide a little "tooth" for the coating to adhere to. Most on grade slabs will have some moisure at the perimeter outside walls. Really good drainage at the outside walls and a sealer down below grade on the exterior side of the footing as a water proof barrier can help emensely.

Jack, LOL. Mine is "only" 75 years old. the ones you show are expensive and methinks the dots and grooves are architecturally pleasing, yet not that easy to clean. I remember the original Pirelli flooring with the dots and I though it was a PITA to mop. This was in a producers office up in Hollywood that I did some work on years ago. It was tile red, which was very nice. But not to clean after some remodeling work.

George (below): You might have to have your floor sandblasted. There is a gizmo now that looks like a rotary lawnmower where all the blasting is done under the "hood" and vacuumed as you go. Contact a flooring company that specializes in floor coatings. I've never seen one for rent.