When it comes to giving your fiberglass door a stained look, there are a few different methods you can use. One popular method is to use a gel stain. This type of stain is easy to apply and can give your door a natural-looking finish. Another option is to use a paint-on stain. This method requires a little more work, but it can also give your door a realistic stained look. Whichever method you choose, be sure to follow the manufacturer's instructions carefully so that you achieve the best results.