I have 5 gallons of Behr ceiling paint. I need to paint my garage. Will this work? I could also mix a gallon of tan paint I could mix in. Just trying to use up paint & save money.

The answer is YES.

CHUCK

Yes you can, no one is going to stop you. But, ceiling paint is not going to cover as well and it won't be very washable. Other than that you're fine.

Jaz