1/4"-thick Aluminum has been one of the staples of the sign industry for many years. Of course, we cut other thicknesses as well, from .020" up to 1/2".
There are many types of plastics available. Each has its own properties which which need to be considered in choosing the correct material for any particular application.
Two of our favorites are Duro-Tek and Strato-Tek. Click this link to learn why we like them so much.