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Can I refinish a fiberglass door?
You asked
Good day. I have a 10yr old stained craftsman door that has lost some stain in one lower area; the bottom half of door is getting cloudy, like a milky film. I would say the cloudiness has come from the finish. Any help would be greatly appreciated.
Asked by Olindo R.
Our expert answers
Hi Olindo: It should be doable. Because fiberglass isn’t porous like wood, you should use a gel stain. Proper preparation is going to be crucial – clean the door with acetone, lightly sand it with 320-grit, apply the stain (let it sit for 10 to 15 minutes then remove any excess) and once it’s dry, seal with a high-quality UV-resistant exterior polyurethane (you probably want to apply 2 or 3 light coats). I suggest you remove the door and do the refinishing in your garage or basement.
Published April 3, 2026 | Last revised April 3, 2026
