Shrinking metal without using crimpers

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Jerry

Radial Skybolt Builder: 220.45% completed

Jan 21, 2019

I'm creating the ends of my main fuel tank.

The metal creates waves when forming it around the curved surfaces (yeah... I know, it does that). Is there a technique I can do by hand that will eliminate the waves?

I saw a youtube video that describes a "tuck" shrinking method where you basically create a "V" shape in the metal and then collapse it, making the metal in that area thicker.