Oxidisation & Durability
When something becomes oxidised it is in simple terms mixed with oxygen, as with all things in our universe when elements are mixed the by-product is a chemical reaction. A first surface mirror commonly uses aluminium for the coated reflective layer. However unless it is protected from the elements Ie. oxygen or humans, it can be damaged or oxidise. The material can be removed from the surface with the smallest of brushes and when exposed to oxygen over time loses some of its reflective quality, this can be detected with the naked eye as the surface turns a mustard yellow. First surface mirrors are generally protected with a very thin polymer coating which provides a small barrier to prevent oxidisation. However this protective coating can only be applied very thinly to ensure you do not introduce "ghosting" found on second surface mirrors.
Cobra Mirrors use the latest technology and innovation from the thin film industry, all Cobra Mirrors are coated in a special "fully transparent coating" locking in the aluminium reflective coating and locking out the oxygen. This formula provides additional protection from the human elements and is scratch, dust, dirt, water resistant whilst maintaining the transparent characterisitics needed for projection mirrors.