Howdy RJ,
Well, I have never used them for filters, but I have cut out a Square of the material, airbrushed it a camo pattern and poked small camo colored bits of cloth thru the weave to create camo netting for use in a diaroma.
This works well for sand colored camo also.
I have also used the material to cover the back of the large military truck models that have a canvas over "hoops" like you would see in trucks used to transport troops. Again, cut out enough material to cover the truck bed and airbrush it olive drab or whatever color the truck is painted. Then you can stretch it across and over the "hoops' and attach the material to the sides of the truck. (see photo)
Anyway, this probably should have been in another thread unto itself, but I will make a new thread when I do the camo netting.
I hope this helps or inspires someone, I just hope it doesnt cause any of you guys to get beat up by your wife for ruining her hose or cause you to get arrested for buying hose lol.
Have a good day,
Greg