This is the way I would do it. "I" should be boldened, but I can't do it
here. Because it is the right way to do it.
Get a metal straight edge. Get a razor cutter (not a box cutter, but like a
Stanley sliding blade), and a couple of clamps. Put the plastic on
something slightly rounded, like maybe a thin strip of carpet under a wider
one. Clamp the metal along the line. Cut easily, the object is NOT to cut
all the way through, but make several repetitive progressively deep cuts.
The hump under the carpet should be placed under the edge of the cut so
there is a slight crowning. This lets the "drop" drop, and opens the cut
into a V so the next progressive cut doesn't bind along the way and to
I have cut 3' wide 1/2" thick layered rubber conveyor belt material with
this in less than a minute once the clamps are set up. DON'T USE A LOT OF
PRESSURE, YOU WANT TO MAKE A SERIES OF PROGRESSIVELY DEEPER CUTS until
you're through the material. Don't get in a hurry. Take your time, and
you'll come up with a very clean cut. If you want to bevel it slightly,
tilt the blade a little. Works on luan, and other materials, too, and gives
a straight clean cut.
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