I now have two straight-up holes in my bumper from fender benders. They are both approximately 5 inches in diameter, and pretty clean. I am trying to figure out the right type of material with which to repair it, as I am unsure if the bumper is plastic or fiberglass. I am planning to do a Bondo job with sanding, and am just unsure of what sort of adhesive tape or mesh to lay over the hole before patching. It is a stock silver, so if anyone can point me to the correct paint with which to cover the final job, let me know!

The vehicle is a 2008 Suzuki SX4.