Product to remove oil stains from concrete for painting?

Scott,

I painted my floor 10 years ago and only have a spot the size of the
bottom of a pop can that came off under the
hot tire of my pickup truck. I used a strong TSP solution (use the REAL
stuff, not a TSP substitute) and then sanded
the entire floor real good with a 20" floor buffer from a local rental
shop. I used a 2 part epoxy floor paint from
Sherwin-Williams industrial paint store. (Don't know if they make the
stuff anymore.) I used 2 gallons for a deep
2 car garage. I suggest using the color flakes that you can sprinkle on
the wet epoxy to give it a bit of traction. My
floor is a bit slippery but I can easily clean it with a cloth broom and
every bit of composite dust is taken up with
little effort.

Don't skim on the prep or the paint or you'll end up like my friends
neighbor. After a month of not parking in the garage
the neighbor drove his new 'Vette into the garage and parked it after
the tires were good and warm. When he pulled out
of the garage the paint rolled up on his tires. He was seriously bummed.

Some visitors from the local metalworking club came over for a little
show and tell on composite construction and visited my
garage-shop. No one brought doughnuts like at the other meetings and I
inquired why afterwards. They mentioned they didn't
want to make a mess in my clean shop. Shoot, I would have thrown some
dirt down if I knew my shop and floor were gonna
cost me doughnuts! Floor must have looked a bit too good in my shop
photos. See links below if you want to see my shop
and floor.

Bart

--
Bart D. Hull

Tempe, Arizona

Check http://www.inficad.com/~bdhull/engine.html
for my Subaru Engine Conversion
Check http://www.inficad.com/~bdhull/fuselage.html
for Tango II I'm building.

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Scott wrote:

I'm looking to find some product that can remove oil stains from
concrete so that paint will stick. My shop used to be used by a car
mechanic and now that I build airplanes in it, I'd like to paint the
floor a very light gray or off-white. I don't think that just using
"Gunk" will remove it enough to get the paint to stick. Maybe some
sort of epoxy-like sealer first? Any ideas?