We do these doors all the time. The only thing that works good for these doors are a stain kit that they should have at the supplier. They are a kit called, Therma-Tru Finishing System. They come complete with a enough stain to do both sides of the door and the sidelights, top coat sealer, mineral spirits in a 4oz bottle, a cheap 3" china bristle brush, a couple of rags, stir sticks, ect ect. We get them for 40 bucks at the door store. Hope this helps, regular gel stain will make the door look like crap. This stuff actually make a nice looking fiberglass door.
www.thermatru.com
Edit: we often paint the side lights white and paint the jamb white as well. Yet there is just enough material to do what you need.

 

I have had good luck with old masters gel stain, not sure which brand your using. What seems to be the problem?

 

That's what I use as well. I love it.

I was surprised at how easy it was when I did my first fiberglass door a few years back.

 

Therma tru is usually what I use , but needed to match the int trim pak this time used a couple of minwax gels to get desired color . Some of the french style doors with full lites do not change grain above and below the lite which makes it tuff to work the stain as even as the sides, throw in the white lite frame and I usually have a cloudy mess on top and below the light.Have had success with jamb and casings by painting them first with a primmer matching the unstained fiberglass. Wish I knew a spray and wipe and spray again technique ,any sense, or am Ijust a wacko short on patience?

 

Old masters rocks... long as you let the gel sit a few minutes, but not TOO long... nothing better.

 

Well i ran into some Old Masters at ICI the other day, i picked up some early american and plan on trying it on the next fiberglass door i have to do. Should be a couple weeks before i get in for touch up. I will let you all know how it works out.
Thanks

 

ICI is carrying old masters now? I haven't been in a ICI in yrs.

 

I guess ICI is carrying it now, i usually just get my caulk from there but i was in there getting some exterior semi-gloss and saw it.

I use old master, I will paint the metal door with a base coat then use old masters gel and a grainer and that's it. It takes practice and patience.

That is a nice finish on a metal door.:thumbsup:
We only stain the fiberglass front doors.

 

I use old master, I will paint the metal door with a base coat then use old masters gel and a grainer and that's it. It takes practice and patience.

 

That door looks freakin' awesome, nice job.:clap:

 

I have done a few fiber glass ones as I don't care for the graining it takes time to get it right. If I get my money out of it then its not bad.

 

Yeah i don't much care for their graining either. I might look into try that on a metal door, one of my own i think. It really does look good. I have seen way worse on some of those therma doors.