To anneal brass sheet, stand the sheet vertical against a fire brick. Heat the sheet with a torch by moving left to right from the bottom until it is dark red, work your way up the sheet until all the sheet has been heated, leave to cool DO NOT QUENCH as this will distort the sheet. If it is a small piece of brass I often use the gas hob in the kitchen, hold the sheet with a pair of pliers.
If you need to make several bends in the sheet you may need to anneal again as brass work hardens.
Mike
If you need to make several bends in the sheet you may need to anneal again as brass work hardens.
Mike
