The hardest part is coordinating the taping: After you paint the first set of squares, pull up the tape, wait a day, and put down a new line of tape to do the next set.
Most chalkboard paint comes in a classic deep gray. A paint store can lighten a quart by adding white colorant. Back home, dark and light can be blended to get a couple of different shades in between. -Deborah Baldwin
More: 5 Clever Ideas for Chalkboard Paint