Things You'll Need
Instructions
Draw the design of the seat on a piece of paper. Use an existing seat and trace around it to get the shape you are looking for. Cut out the design from the paper with the scissors.
Place the cut-out design onto a piece of 12-gauge sheet metal. Trace around the design using the felt-tip marker to make an outline. Cut out the outline from the sheet metal with the tin snips or using the angle grinder with a metal cutting disc.
Smooth any rough edges on the metal by using an abrasive disc with the angle grinder. Set the seat pan face down on the mallet bag.
Hammer the seat pan with a mallet to make a curve or "bucket" shape. Smooth the seat pan by running it through a metal roller to remove all of the hammer marks.