IS IT POSSIBLE TO ATTACH HEAVY OBJECTS TO NEWTECHWOOD SIDING, SUCH AS SIGNS OR CABINETS?

Yes, this is possible. However please be sure to screw through the siding to the joists themselves, to ensure the weight is on the joists and not the siding. As the siding is designed as a rain screen system, it cannot hold the weight. Specifically, you would want to pre-drill holes through the siding and into the substrate for the mechanical fasteners they choose. These holes need to be a couple of sizes larger than the fasteners they choose to allow for expansion and contraction of the siding boards.