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Fiberglass doors are an innovative alternative to a standard entry door.  They can be stained to almost any color to match your decor.  Fiberglass offers many advantages over standard metal and wood doors.  They are rust-proof, rot-proof, environmentally friendly, durable and versatile.  They are available in different colors, wood grained varieties and also in carved or distressed looks.

Staining fiberglass doors is very easy.  There are two standard ways of staining the doors, one that I recommend and one I don't.

The standard way of staining a fiberglass door is to use a gel stain to achieve the desired color, then protecting the door with a spar varnish.  This method is ok, however, the spar varnish will break down with age.  The UV rays of the sun will eventually cause the spar varnish to peel. 

I recommend using a product from Sikkens called "Cetol Door & Window".  This product is not a gel stain, instead it is a high solids alkyd stain/polyurethane mix.  There is no need for two different products.  Simply apply two coats of the color you have picked.  Every few years you can do a maintenance coat of the same color product or switch to one of the clear finishes in the Door & Window line.  Using a clear finish will not darken the door.