I just bought a used Linhof Technikardan. It is in very good shape. The bellows are light tight, but, as typical, the few inches closest to the lens are crumpled. I'm not sure they're bad enough to sag into the path of the image, but under the wrong conditions they might.

I have removed the bellows and re-creased/reshaped the bellows to their original shape. My question is how might I treat the bellows to hold their original shape? Options I've considered: Steam (some kind of tiny, low heat iron)? Some kind of natural or synthetic sizing? Very dilute shellac? Just water? Other substance? What side would I apply the treatment?

Anyone got a wasted Technikardan bellows they would be willing to send me for experimenting? I'd share the results.

Brian