I would make this as a two piece design and out of stainless steel. The design is welded to a 2" square tubing with holes drilled to fit a 2" receiver.
I would cut out a square shape and it would have a brushed finish. The waves, IRON SAND MALIBU would be cut out of the square shape. Letters like O, A, D and B would be connected together or the centers would fall through like carving a pumpkin.
Then I would cut out the knife and plug weld it to the top of the square shape and it would be polished to a mirror finish.