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And that is the problem with using fabric…

With Canvas, you can cut it with a sharp edge and the weave will lock the threads in place. There will be some fraying but will eventually stop.
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Felt is good for nano sprays, but there are better alternatives.

Yes, Cotton or Polyester canvas, $10 per yard X36in. and usually 50 percent off if you shop.

They also sell nylon and polyester strapping, but usually in 2 in width, by the yard, for a couple...