How do you get paint off of concrete?

Answer 1

Paint thinner and a wire brush?
Acetone?
P.O.G.-Paint oil and grease remover?
Latex or oil based?
Paint over it?
I dunno.

Answer 2

Go to your local hardware store and look around the concrete paints you will find a concrete cleaner that will take almost anything off of concrete.

Answer 3

Strong paint thinner will after a few applications finally clear it
If you can afford it (and the price is coming down), a pressure washer will work wonders on paint. Once you own one you'll find all kinds of uses for it.
The pressure washer is great advice. I have a pressure washer and used it to remove 30 year old paint off of brick.
Solvents, even carburator cleaners, are more effective with dry rags to absorb the paint residue. Be sure to dispose of the rags safely or contain them properly for future use.

Answer 4

Sand blast.