Garage Door Refacing is exactly what it sounds like. We reface both new and existing garage doors to look and feel like real wood without any of the maintenance. We have some high strength materials that we use. In a side by side comparison you cannot tell its not real wood.
In lieu of wood we use a high strength resin based panel. More realistic than any composite or faux finish. Just didn't make sense for us to use wood with all the issues of weight, rot, mold, fading, etc.
Hope that explains it.