My fiberglass door is peeling. How can I fix it?

If your fiberglass door is peeling, you can fix it by sanding, priming, and repainting or restaining the door, which is a common maintenance issue with fiberglass doors exposed to sun and moisture. First, identify peeling type, if painted fiberglass door is peeling, it is usually due to poor adhesion, moisture, or UV damage. If stained fiberglass door with wood grain finish is peeling, clear topcoat is failing. To fix painted peeling fiberglass door, remove loose peeling paint with scraper and 220-grit sandpaper, sand entire door lightly to scuff surface for adhesion, clean dust with tack cloth, apply exterior bonding primer suitable for fiberglass, then apply two coats of high-quality 100 percent acrylic exterior paint, using brush or sprayer, following manufacturer drying times. For stained fiberglass door peeling, sand peeling clear coat lightly, clean, apply gel stain if color faded, then apply two coats of exterior polyurethane clear coat with UV protection, preferably marine spar varnish. Always paint in shade, not direct sun, and temperature 50 to 85 degrees. If peeling is severe due to moisture from bottom rail, check weatherstripping and seal bottom with composite frame. Prevent future peeling by cleaning annually, avoiding harsh chemicals, and reapplying clear coat every 3 to 5 years. If damage is extensive, consider professional refinishing costing 200 to 500 dollars or door replacement if fiberglass skin cracked.

If your fiberglass door is peeling, you can fix it by cleaning, sanding, priming, and repainting, as peeling on fiberglass door is usually paint failure, not fiberglass itself, due to moisture, sun, or poor prep, fixable with proper preparation and exterior acrylic paint, steps include cleaning, scraping, sanding, priming, and painting. Fiberglass doors are made from fiberglass skin with gel coat, painted at factory, with peeling occurring when paint loses adhesion due to moisture, UV, or insufficient prep, especially on south facing doors. To fix peeling fiberglass door, first remove door or protect surrounding, clean door with mild soap and water, rinse, let dry. Scrape peeling paint with plastic scraper, not metal to avoid scratching fiberglass, remove loose paint. Sand peeling area and entire door lightly with 150 to 220 grit sandpaper to scuff surface for adhesion, sanding by hand, not power sander to avoid damaging gel coat, wipe dust with tack cloth. If fiberglass skin exposed, apply fiberglass primer, if just paint peeling, apply bonding primer like Zinsser Bulls Eye 1-2-3 or exterior acrylic primer suitable for fiberglass. Apply two coats of exterior 100 percent acrylic paint, color matched, using brush or small roller, thin coats, drying between coats per manufacturer, with topcoat of exterior acrylic latex, semi-gloss or gloss for doors, with light sanding between coats for smoothness. If large area peeling or gel coat cracked, may need professional repainting or gel coat repair. So fix peeling fiberglass door by cleaning, scraping loose paint, sanding lightly, priming with bonding primer, and repainting with exterior acrylic paint two coats, with proper prep to ensure adhesion and prevent future peeling.