How to Prep a Fiberglass Hood
- 1). Attach a piece of 180-grit sandpaper to the bottom of a long sanding board. Sand the surface of the fiberglass hood with the 180-grit sandpaper. Run your hand over the hood as you sand to find imperfections. Stop sanding when the hood feels smooth to the touch.
- 2). Remove sanding dust from the hood with a clean rag.
- 3). Hold the tip of a spray can of primer 12 inches from the surface of the hood. Spray an even coat of primer on the entire surface of the fiberglass hood. Allow the primer to dry for 24 to 48 hours.
- 4). Fill a one gallon plastic bucket half way full with water. Transfer water from the bucket to the fiberglass hood with a sponge.
- 5). Sand the wet surface of the fiberglass hood with 400-grit sandpaper. Continue sanding until the hood has a glassy smooth finish. Clean the "mud" created by the wet sanding from the hood with clean water and a clean rag. Allow the hood to dry.
- 6). Run a tack cloth over the prepped hood before applying paint to the fiberglass surface.
Source...