Use a router to trim Formica.
Formica is brittle and can't be cut with a saw or a knife. A router must be used to trim Formica to prevent chipping or cracking. There are router bits specifically designed to cut a clean edge on countertops or Formica-laminated wood. You can choose from a variety of knife profiles but the most common is the straight cutter bit with a bearing at the bottom that controls the depth of cut.
Instructions
1. Install the Formica cutting bit into the router. Adjust the depth of cut so that the bearing extends down through the router base 1/2 inch. The depth of cut adjusting knob is the only knob on the side of the router.
2. Grab the router with both hands on both sides. There are hand-holds for this purpose on both sides of the router. Set the edge of the router on the laminated top. Don't let the bit touch the Formica.
3. Pull the trigger to start the router. Slide the router on the Formica, letting the bit cut into the Formica until you hit the edge of the wood.
4. Pull the router toward your body as you slide the router along the top of the Formica, letting the bearing on the bit ride along the edge of the wood. When you come to a corner, follow the corner around keeping the bearing tight against the wood.
5. Pull the router along the perimeter of the wood, always keeping the bearing in contact with the edge until the trimmed off Formica falls away. Release the trigger and set the router down.
6. File and polish the edge of the Formica with a small, fine-tooth file. Round the edge slightly with the file to finish.
Tags: both sides, , Formica letting, keeping bearing, Pull router, router along