To paint a garage door, first clean and prep the surface by sanding and removing old paint. Apply a primer if necessary, then use exterior paint designed for metal or wood doors. Apply multiple coats for a durable finish and allow adequate drying time.

Paint a garage door by cleaning and prepping the surface, sanding off old paint, and applying a primer if needed. Use exterior paint suitable for metal or wood doors and apply multiple coats for durability. Allow sufficient drying time between coats for best results. Regular maintenance can help preserve the paint job.