you can hurt (or kill) yourself trying to use pro paints. Depending on what you get, it's not unheard-of to spend $10k getting to the point where you can paint a bike, and paint in small quantities costs around $200 for a frame. BITD, framebuilding included painting, and I love to paint. But I have decided that I'm not going to invest the money for the painting equipment right now. I'd rather spend what it takes to get a pro do it.