For most diyers on the other hand this is the preferred choice when it comes to cutting sheet metal.
Cut sheet metal without curling.
The method you choose to cut sheet metal depends on the thickness of the metal and the type of cut you plan to make.
How to cut thin sheet metal and keep it flat.
Start by taping both sides of the sheet metal directly over the line you want to cut and clamp the metal to a work station so it doesn t move.
If you use metal shears to cut thin sheet metal such as duct metal it curls and can be difficult to flaten properly.
It involves a bit of more work but the good thing is that most of the tools required are very basic.
Among others the most basic manual tool that you can use is a tin snip.
The illustrations are for a small bracket but i have cut 3 foot.