Some large pieces of carton, five-strip aluminium plate (2 mm thickness), 5 meters of car finishing strip (metal core)

Scissors, inch tape, pliers, rubber hammer

STEP

Cut two templates out of the carton for the foot wells. Start with a rectangular piece of about 73x41.5 cm. Round the corners (radius 3 cm) and cut out the corner. Obviously the shape of the two foot wells is different! I made about 4-5 pieces before I was satisfied. Do not make the fit too tight since you still need to apply the finishing strip.

Take the carton templates to a metal workshop where they sell and cut aluminium plate to size. Ask them to use five-strip aluminium plate of 2 mm thickness. Also ask them to round the edges to prevent cutting the barchetta floor covering during fitting (see detail picture). I paid about 40 Euro for the aluminium, but that might vary substantially dependent on the workshop...

Fit the alu floors by carefully bending them at the appropriate places and angles. Preferably bend around a steel pipe of appropriate thickness to prevent sharp bends in the alu floors.

Use the finishing strip to cover the edges of the alu floors. I found perfect fitting strip with a metal core, which fitted without using glue (see detail picture). Start at the top part of the alu floors, so the joint will be out of sight. Use a rubber hammer to carefully put the strip into place. Cut to size with pliers.