I'm updating our house and I saw on one of Bob's shows a woodgrain painting technique by one of his guest. Can anyone tell me what materials to use? (paint, brushes, etc.) Also the doors I want to woodgrain are metal and wood, should I stip the paint off the doors or can I just paint over the other paint. They are all in good condition. Or is there a book that will give me a clue as to how to do this task. Thanks for any help anyone can give me.