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Hi Tomasz - the breathing cloth is specifically designed to not stick to the epoxy. I forget what the material breather cloth is made from, but epoxy definitely does not stick to it. very useful!It peels off and since it's a woven cloth, you will see a texture on the epoxy. this can be polished off with light abrasives, though.
make a manual vacuum pump for under $20 by converting a bicycle pump
Simple methods for molding fiberglass and carbon fiber