Saved by time tested restorations.
How to make louvers in sheet metal by hand.
Few things make a hot rod scream traditional more than a helping of perfectly placed louvers on its flanks.
Place the tube in the drill press chisel in the vise.
Mark a line across the width of the same edge of the board as the groove to be cut in style.
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Give it a few real good wallops.
The finishing block minimizes any tool marks and makes the louvers consistent.
You can take your frustrations out on the finishing block.
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Build a dam around the hole with modeling clay.
The hole could also be cut with a piece of copper tube using valve grinding compound to cut.
From start to finish it takes about ten minutes per louver.
Having been around as long as original prewar hot rods themselves these crafty speed.
Drive the finishing block into the formed louver.
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.
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Make a mark at 3 4 in each direction from a center point on this line.