Step 1: To erase any sign that your new, albeit temporary, dining space is simply a waiting room for your trusted automobile, it's best to start from the ground up. Pick up three gallons of garage floor paint in contrasting colors to create a graphic pattern which will result in a dining-room-rug-like appearance. I suggest stripes since they're simple and quick to create.
After washing the surface with a hose and letting it air dry, paint the entire surface a solid base color using a roller on an extender pole. Once the base color is dry to the touch, use painters' tape to mark your pattern. Paint your first accent color between the proper pieces of tape. Once the first accent color is completely dry, reposition the tape as necessary, then paint your final accent color. Wait at least 4 hours before walking on the newly painted space.