Step 4A in creating grain sack barstool cushions is to select two seat pieces of fabric on which to paint the design. These will be the top sides of each cushion. Measuring side to side, find the center point and tape off two quarter-inch wide stripes. Using a one-inch brush and acrylic paint, paint the space between the taped lines. Allow some fabric to show through the paint for a time-worn look. Remove the tape.