Is your laminate countertop looking a little worse for wear? Fixing those wrinkles may be easier than you think. Cracks, burns, or knife scars in laminate countertops can be filled with a simple plastic filler made for this purpose. Before beginning the repair, be sure to prepare the laminate countertop surface in accordance with manufacturer's instructions. Then, with just a bit of sanding and a special topcoat, your laminate countertop will look like new.