Any advice on painting a brown woodgrain finish fibreglass garage door, I want to paint it gloss white. I'm wondering about preperation, primers, top coat?
Wash down and sand with fine sandpaper. Then use something like This to prime it. When dry, use any good quality undercoat and gloss to finish. Might be worth using a small roller on such a large surface as will be done in quick time with less chance of leaving brush-marks/breaks.