This has minimal bearing on the 28mm pulp gaming we usually do that might involve a zeppelin, but it’s such a cool and masterful technique I have to share: Creating Zeppelin bodies with foam insulation.
Basically, take long billets of foam, run a hot wire knife across a profile, and rotate the billet to create that distinctive “faceted” look of a Zepp body. Very cool.
Of course, I once calculated a 1/56 (28mm) scale of Graf Zeppelin would be about 19 feet long (nearly six metres!), so doing the gondola and a bit of the body in 28mm is (marginally!) saner. Only marginally, mind you. The small-scale foam zepps in the first link are a lot smaller and saner; they’re still about 3ft long, though.
If you are minded to do some zeppelin construction, in whatever scale, you could do worse than following the useful links from this Propnomicon posting called “Zeppelin Goldmine“, which has links to high-quality scans of a book of speculative 1920s designs for a Graf Zepp-sized trans-Atlantic zeppelin. The gondolas of those look fairly buildable as 28mm skirmish terrain, actually. One of these days…