Wood grain can be added to any door or surface with the help of a simple, hand-held tool that can be purchased at most hardware stores. You have to do your prep work before you paint a metal door to .
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.
Use a wooden dowel or metal bar for sliding doors and windows so they can't be pried open. use a vinyl fence picket (white) to match the white vinyl surrounding your sliding door.
Painting a Door Without Taking It Off the Hinges - Cover hinges in painters tape. Smooth tape with finger. Use an exacto knife to slice tape around hinge. Paint away!
How to paint your front door metal framed storm door, Petticoat Junktion