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"
How to paint garage door.
DIY Garage Door Makeover with Stain
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.
Painting Our Garage Doors A Richer, Deeper Color
Urbane Bronze by Sherwin Williams in their Duration line since that's what the house painters used and loved. (it's supposed to be extra durable and even has exterior primer built in). <----- brick house with dark garage door.