4. To expose the sheetmetal on the underside, the bracing needed to be cut on all six points. Then, Jerry carefully hammered a putty knife between the bracing and the sheetmetal to separate the two. |  |  |
5. With the bracing out of the way, the underside of the hood was sanded down to bare metal. | 
Part Two: Punch It!
1. Sir Michaels owner Mike Burley took over to lay down the guidelines for six columns of 4-inch louvers. next, Mike used a special prenotched ruler to mark off each row of them. Then, he penciled in the lines that would be the guide for each punch (inset). |  |
2a. Here is a sampling of the many different shapes, sizes, and designs of louvers that can be punched. | 
2b. Right next to these is the cabinet that holds all of the specialty dies used to make the various louvers | 
3. The die for the 4-inch louver was attached to Mike's large press, and the punches were made. The hood was held in place by a set of specialty stands, and each louver was made one by one. As the hood was moved around, Mike adjusted the stands to support it correctly for every punch. |