A jigsaw provides a fast, safe way to cut plywood. The catch: It's nearly impossible to keep the narrow blade cutting straight when sawing the thin sheets. The solution is to clamp a pair of straight-edge boards in place to serve as a saw guide.
- Place the first guide board on the paneling parallel with the cut line.
- Hold the base plate, or shoe, of the saw against the board to be sure the blade is lined up with the line.
- Then remove the saw blade, place the tool against the first guide and position the second guide tightly against the opposite edge of the shoe before clamping it down.
- Repeat this procedure at the other end of the guides to create a perfect-width channel. Then reinstall the blade and slowly push the saw through the channel for a straight cut.