Sand down the countertop with medium-grade sandpaper to get rid of any imperfections. Wipe away the dust with a tack cloth.
Lay the laminate sheeting down on a workspace so the back is facing up. Flip the countertop on top of the laminate sheeting so you can trace around the rounded edges. Alternatively, get the dimensions of the countertop and use them to mark the laminate -- give yourself an extra inch in each dimension.
Follow the outline you created by tracing or marking measurements with a circular saw, jigsaw or router to cut the laminate. Paint a thin, even layer of contact cement on the countertop and the back of the laminate.
Lift the laminate up with a team and carefully lower it down on the countertop. Line up the edges so that the overhang is even on all sides. Move a laminate roller over the top of the laminate to press out any air bubbles.
Trim the edges with a router or jigsaw once the contact cement is dry. Don't force either tool through the laminate -- just gently guide it along the outer edge of the countertop for a smooth finish, especially around the rounded edges.