Repairing Formica Countertops. If the edge of the laminate is damaged beyond an easy glue fix, remove the edge, lightly sand the exposed surface to remove any old adhesive, and glue on a new. You'll need to reapply it on a regular basis -- probably at least every couple of months.
Spread contact cement on with the applicator or a disposable natural-bristle brush for a laminate countertop adhesive, covering all edges. Applying a coat of paste wax will add a new shine to the surface and help hide any scratches. The countertops are edged with stained wood, and the backsplash is wood trim.
Scratches can also be removed using car wax or a special Formica and Laminate repair paste.
This is a guide about removing heat stains and burn marks on Formica.
Black & Decker's Complete Photo Guide to Home Repair sums it up perfectly, when they say, "Laminates are durable and stain resistant, but unfortunately, their surfaces are usually impossible to repair." I have a damaged area on my formica eating bar. Use a jigsaw or router fitted with a straight bit to cut out the damaged section of counter. You can repair your chipped and aging laminate countertops using simple techniques and, in some cases, common household products you probably have around the house.