The easy way to update the look, not as cheap as DIY w/gel stain, but looks even more like a wood carriage door. "Garage skins application GarageSkins Give You a Wood Look Without the Cost"
DIY: Garage Door Makeover With Gel Stain - this is a quick and inexpensive way to add curb appeal to your home. I could practice with my garage door MR ran into with dirtbike. Use ebony or dark gray stain.
Easy Garage Hardware Update with new handles and hinges