Set the piece of aluminum on a table or over sawhorses and position it so the cutting area has open space underneath it.
Cutting aluminum sheet clean.
Clamp the aluminum down.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
Sheet aluminium can be cut without the need for a guillotine or tin snips which tend to deform the metal.
Place the fracture line over the edge of a table and bend the overhang slightly downwards.
To cut the sheets of metal rathe.
If you use metal shears to cut thin sheet metal such as duct metal it curls and can be difficult to flaten properly.
How to cut thin sheet metal and keep it flat.
This weakens the aluminium and creates a fracture line.
2 mark the start and stopping point of your cut.
The illustrations are for a small bracket but i have cut 3 foot.