Battlefield Basing : Battlefield Razorwire The Amy Painter

With the help of the Precision Side Cutter, cut the length you need. 

Making miniature Razorwire

By using the back of your larger brushes it is easy to roll the wire tight around the handle, creating the curled shape and cut the length you need for either basing or terrain -  adding a few dabs of the Rust Effects will give it a nice weathered look.