Metal staples can then be used to attach the hardware cloth to the door. Many smaller staples will work best and there is less a chance of the wood splitting by using larger staples. You may also want to drill pilot holes for the staples to prevent splitting. Now, like the plexiglass door, it can be turned around and installed attractively. You may also choose to add some trim or molding over the edge of the hardware cloth to easily reduce the number of sharp edges and make it much more attractive.
Most hardware cloth has many rough and sharp edges which can easily be removed.
Another option when working with hardware cloth is to purchase plastic or rubber coated varieties. You can also buy plastic or rubber that you can brush on the hardware cloth yourself. It will help with iguanas that may rub their noses on the hardware cloth, but it may need to be replaced or recoated from time to time due to wear and tear. Another door option is to build a door that can be easily removed or opened so that the iguana will have the option to leave the habitat. Many people that have free roaming iguanas, also have habitats that give their iguana the freedom to come and go as it pleases.