There are many rules for the display of the American flag, none of which have the force of law because: free speech.
Recommendations for displaying the flag include never letting it touch anything beneath it, including specifically the ground; and, never displaying it in a way that will let it become damaged or soiled.
I would assume if you love the flag, you know the guidelines for displaying the flag.
I would assume if you love the flag enough to paint it on your driveway, you love it enough to not paint it on your driveway.
