Step One: After you have determined which bench seat needs a little extra TLC, lay out the fabric on your bench. Position it so it is perfectly straight before beginning. You may need to sew two pieces together to make it fit your bench seat.
Step Two: After the fabric is perfectly straight on the seat, use your staple gun to secure it to the bench. Pull it tight for the best look. I just stapled the new fabric to the old stuff, you couldn’t see it through the new fabric and I didn’t mind.