The good news is, it’s possible to apply a darker gel stain over the lighter fruit wood stain. The stain I like the most is Old Masters Gel Stain. It is available in several different colors and can be intermixed for custom stain colors.

It’s very easy to change your fiberglass doors stain color, as long as it’s a darker color. For a lighter color stain you will need strip off all stain and finish.

1) Make sure the door is very clean. Wipe the door down soap and water, dry the surface then follow up with denatured alcohol to remove grime or oils. A good surface prepping solution can also be used.

2) Lightly sand. Very lightly sand the door with 320 grit or a fine sanding block. This sanding will dull the gloss a little. Don’t try to sand the door smooth, this will ruin it.

3) Brush on the gel stain and apply a protective clear finish. Follow the steps on this page, Staining a Fiberglass Door

4) Remember to protect your newly stained fiberglass door with a clear, exterior-grade polyurethane finish for added durability and longevity. This will help protect the door from the elements and maintain the richness of the oak color over time.