http://benoit.suaudeau.perso.neuf.fr...air/01-03.html Compur manual for reference.

I'd suggest denatured alcohol or naptha, both found cheaply at hardware stores and both with no worry over 10% water.

Shutterfinger's advice is the same as what I've heard elsewhere and I trust it completely.

In the end shutters like these aren't made anymore and we are the guardians of the last remaining, working examples of a century of mechanical engineering