The UltraLux is a manmade material anyway, and is supposed to be much more resistant to stains and such than real suede, as well as being easier to clean. I can vouch for the latter, as my wife managed to get tree sap on the inserts in the 04 Malibu, but they came right out.
I'm not sure how much additional protection you would need.
Ultralux(TM) is a patented material consisting of fibreglass coated in Teflon(TM). The Teflon ensures that dirt, dust and other materials do not adhere to it, with rain often being sufficient to wash them off.