If you want to give the exterior of your house a bit of a change, you may want to paint your garage doors. This is an effective way to boost your curb appeal without having to paint your entire house. To ensure the job goes smoothly, you may want to avoid these common mistakes. 1. Don't Use Interior Paint If you have extra interior paint, it can be tempting to put it on your garage door, but unfortunately, interior paint does not work well in the great outdoors.