http://www.pournrestore.com/
I used Pour 'n Restore to get the oil stains out of my concrete floor so I
could paint it. Worked great, I'm a believer. After I got the oil stains
up, then I did the acid etch.
IIRC, I used the Sherwin Williams garage floor treatment, and after they
sold it to me and I botched the application, they said it should only be
applied by professionals.
Oh, well.
Ed Wischmeyer