If your garage door has water or sun damage, or is just looking beaten, worn, or dingy, you may want to think about refurbishing the surface.
Refurbishing a garage door can be a chore, but its worth the good presentation of the front of your home, for curb appeal when selling and to make a good impression on guests.
Most garage doors, let's admit, are basically just large, flat surfaces. They can be a hugely dominant and yet vastly uninteresting part of your house's faade. If you don't want to simply paint it one color, for fear that it will overwhelm the rest of the home, you can give it what's known as a faux treatment.
Garage doors tend to be incredibly heavy, using torsion springs (or other varieties) to make it easier for a person to pull up. Working with the spring itself should never really be tried by do-it-yourselfers unless they have a huge amount of experience and assurance of their own competence, because it can be very dangerous.
So if you find you have to replace a panel before you can get down to painting, you should call in professional help, contacting a garage door installation person or a garage door services company.
Once you've replaced the section that needs replacing, all you need to do is scrape off the ld loose paint and then slap on a layer of primer.
After that, you can go to town with textures and colors, fake wood-grains and varying levels of shiny finish.