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Here are portions of Swordfish. A typical fabric covered finish. It was in 2000 when people there said they wants to use the Linen fabric instead of modern ones as long as supply lasts.
Not just material but skills. Also please read this document. They say CB dope paint is no good since it keeps on shrinking for decades eventually to cause some deformation on the rebuilded planes. The older nitro-cellulose dope is better because once it dries and set, is more stable than the newer cellulose-butyrate dope.
http://www.awm.gov.au/events/conference/bigstuff/papers/treatment/nitrate.pdf