The is door is a fiberglass door and started out all white. You can see where I was testing out the primer to see how well it would adhere. I use grey 'gripper' primer from Glidden and after it dried you couldn't scrap it off at all, worked fantastic.
I start by taping off where the horizontal wood grain will be painted in.
Then once taped off I use SW Fiery Brown for the first coat of wood grain color. Then I use SW Black Bean for the second and darker coat of wood grain color.
This next photo is a great view of the wood grain I painted on. This door came out great.
The finished job again.