(rich a.) wrote in message . com...
I work in the monument (gravestones) industry and we occasionally need
to remove oil spots on granite/marble monuments, usually caused by
careless lawn workers putting an oil can on a monument.
Try Klenztone #1 to clean the concrete or even limestone. IRT,
Lee's Summit, Mo. 816-795-1106, sells Klenztone. This stuff is
terriffic!!!!!!! I used it to clean up a 40 year old wearhouse floor
at a salt mine in Kansas. We used it clean and prep damaged areas of
the floor. Belzona 4111 (epoxy concrete) was used to repair the
floor. An outfit by the name of BB Casewell has had good luck putting
down epoxy floor finishes. I think they are out of St. Joseph, Mo.
The folks at IRT could direct you the them.
Tide detergent also works but is a mess to clean up. I have used the
method Rich talked about and it does work. You may also try the same
thing with fine sawdust and the solvent of your choice.

While the following method may not be suitable for an entire floor, it
works good for smaller spots. Make a poultice paste of common white
plaster and laquer thinner (or white gas) and slather it on the stain
with a trowel, leaving it approx 1/2" thick (thickness not critical).
As it drys the plaster will draw out the oil. When dry, scrape/sweep
it off. Be careful not to let the plaster get wet from water (if
outside cover with plastic sheet) or it will harden and will have to
be chipped off with a chisel. Like I said, this may not be practible
for a large floor....but will do the trick for smaller stains from
engine oil drips on a hanger floor. Deep stains may require more than
one treatment.

Usual disclaimer about being careful with fire/sparks near flammable
substances, etc.

Rich A.