It's not easy to replicate it in 1/72 but this time I'm going to try mosquito netting. I've read about people using some sort of metallic netting but the one I have here is made of a synthetic fiber.
How did I do it?
1-Dipped the mosquito net in a mixture of white glue and water;
2-Stretched it with the help of a bit of foam and metal pins;
3-Painted it with Vallejo acrylic paints once it was dry;
4-Cut a length of it with a sharp scissors.
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Other ways:
http://www.soldatinionline.it/Articoli/Tecniche/bD.I.Y-barbed-wires-b.html
https://armorama.kitmaker.net//features/107