Place the fracture line over the edge of a table and bend the overhang slightly downwards.
Cutting aluminum sheet clean.
Set the piece of aluminum on a table or over sawhorses and position it so the cutting area has open space underneath it.
This jet of water eats away at the metal and leaving a clean smooth edge.
Clamp the aluminum down.
2 mark the start and stopping point of your cut.
To cut the sheets of metal rathe.
With the aid of a straight edge and a sharp knife score both sides of the aluminium sheet.
If you use metal shears to cut thin sheet metal such as duct metal it curls and can be difficult to flaten properly.
This weakens the aluminium and creates a fracture line.
The illustrations are for a small bracket but i have cut 3 foot.
These photo steps show that it can be done using a utility knife.