Measure the dimensions of the area where the Marmoleum needs to be fitted.
Use the straightedge and pencil to mark one or more lines as needed. To cut around a fixture, make a paper template of the floor and mark the area of the fixtures. Place the paper template on the Marmoleum to use as a guide.
Holding the utility knife at a slight angle, place the edge of the knife at the start of the line and firmly score the Marmoleum along the length of the line using steady pressure. Cut approximately one third of the way through the material.
Place the hook blade knife at the start of the scored line and press down, slightly undercutting the material to the end of the line.
Using a utility knife, cut a small piece of Marmoleum from leftover material or a hidden area like a closet.
Cut out the damaged area of the Marmoleum.
Cut the replacement piece into small shavings with the utility knife and mix them with a few drops of all-purpose white glue.
Place the material into the void left by the cutout and smooth it into place with a putty knife.
Allow the area to dry overnight and then sand it smooth with medium-grit sandpaper.
Apply Marmoleum floor finish as recommended by the manufacturer or retailer.