I am new to this so I thought I would ask for some advise from those who know. If I want to bend brass bar stock, say 1/4" or 3/8" stock, to maybe a 45 degree angle should I just use force against the cold bar or should I first add heat to the stock? If I need to heat it first then how do I tell when it is pliable enough to bend without cracking? Much thanks for any input. UpDown