thats kind of cool, try sticking with steel instead of brass, make sure there isnt a coating on it first, im thinking of getting a wood lathe and making pipes out of my garage, i used to do it in high school, i was the only person in my class not to get caught making one, because when someone else was making one they would make all the parts in one day and have a crowd of people around them, and since im "socially weird" some people say i would be by my self on the lathe making pipes and fancy pens all semester.