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How to make louvers in sheet metal by hand.
The finishing block minimizes any tool marks and makes the louvers consistent.
Use light taps and work the metal into the die evenly.
You can take your frustrations out on the finishing block.
The hole could also be cut with a piece of copper tube using valve grinding compound to cut.
A clamping arrangement must be designed or hole drilled with a carbide drill.
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From start to finish it takes about ten minutes per louver.
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Having been around as long as original prewar hot rods themselves these crafty speed.
Drive the finishing block into the formed louver.
Saved by time tested restorations.
Build a dam around the hole with modeling clay.
Make a mark at the center of this line then make a 45 degree mark in the same direction that you positioned the router guides in the last step through the intersection.
Mark a line across the width of the same edge of the board as the groove to be cut in style.
Make a mark at 3 4 in each direction from a center point on this line.
Few things make a hot rod scream traditional more than a helping of perfectly placed louvers on its flanks.