Here are some things I found:
Creating Faux Wood Finishes
Decorating : Graining / Combing : Faux Wood Grain : Home & Garden Television
LIVING : Walls & Floors : Faux Wood Grain : DIY Network
The building where I live in NYC has used a technique like this on a lot of the doors in its lobby area. They were originally metal and have had their faux wood grain surfaces touched up from time to time.