Bare wood? What type of faux painting do you want to do? You can use a patterned roller to make a faux design or many other options. Here's an article that might help:
Bare wood, barn wood ?
I have painted paneling I want to make look like barn wood
I have painted paneling I want to make it look like barn wood
Ok, look at You tube for tutorials on how to paint to look like weathered wood. There will be a lot for You to view and see which technique you like. Have fun. I like to use oil based paint because it's a slower drier and I can manipulate it easier.