Because fiberglass garage doors are smooth and nonporous, they are highly resistant to primer and paint adhesion. If you wish to remodel your fiberglass garage door with a coat of paint, you will need to dedicate yourself to proper surface preparation, or your painted finish will chip and flake away. In addition, because fiberglass garage doors are slick, you should use a particular application process that will encourage a nice-looking finish free from sags and brush marks.
Things You'll Need
- Dish soap
- Water hose
- Palm sander
- 300-grit sandpaper
- Heavy-duty fabric dropcloths
- Blue painter's tape
- Acrylic latex primer
- Roller frame
- 2 nap roller covers
- 4-inch latex paintbrush
- Acrylic latex paint
Clean the garage door with water and dish soap. Rinse the fiberglass using a water hose. Allow the door to dry.
Encourage primer and paint adhesion by roughing up the fiberglass door using sandpaper. Load a fine-grit sandpaper into a palm sander, and abrade the fiberglass until it feels slightly rough.
Elevate the garage door high enough to slide dropcloths underneath. Close the door once the drop cloths are in place. Cover portions of the fiberglass garage door that you want to remain unpainted with painter's tape.
Apply a latex primer to the abraded door using a roller. Smooth the wet primer with a 4-inch paintbrush manufactured for use with latex water-based coatings. Raise the garage door 1 foot. Wait two to three hours for the primer to dry.
Clean your painting tools with water.
Apply acrylic latex paint to the primed fiberglass garage door using the roller. Use a new roller cover. Apply the paint as you did the primer. Raise the garage door 1 foot. Wait two to three hours for the paint to dry.
Tips & Warnings
- Do not choose a sandpaper with a grit below 300, or you may scar the fiberglass garage door.
- Failure to raise the door during the drying process can cause the seams to stick shut.
- Photo Credit fancy garage 2 image by Aaron Kohr from Fotolia.com
Choosing Paint for Fiberglass
Choosing the right type of paint for fiberglass parts will help your part last longer, and look better for the length of...
How to Paint a Fiberglass Entry Door
Painting a fiberglass entry door is much like painting a wood door, without a need for sanding before paint is applied. Use...
How to Repaint a Fiberglass Door
While doors are traditionally made from materials like wood or metal, fiberglass offers a usually inexpensive and lightweight alternative that can be...
How To Paint a Fiberglass Exterior Door
If you want to finish a fiberglass door with a fresh coat of paint, you'll have to focus heavily on preparation, or...
How to Remove Paint From Fiberglass Doors
Due to its light weight and ease to work with, fiberglass is a popular choice of material for all types of doors....
How to Repair a Fiberglass Garage Door
A fiberglass garage door is light but strong. The surface is also easy to clean but the door itself may break if...
The Best Paint for Fiberglass House Doors
Fiberglass doors don't warp, rot or rust and are fairly common in newer houses. Typically used as main-entry and other exterior doors,...
Fiberglass Entry Door Refinishing
The finish on a fiberglass entry door will fade over time due to exposure to the sun and weather. The refinishing process...
The Best Way to Paint Fiberglass Doors
Painting your fiberglass door is no different than painting any other door, though the preparation is a bit different if the surface...