For what it's worth...
Wait...you're supposed to clean them???
hahahahahahah I love that
Yep.
What I did 3 months ago (and the models are still standing):
Mine were covered with smoke film (no comments please; I'm not quitting and that's THAT) so in a ventilated room (my kitchen sink) I get to work. This is a radical cleaning, done once every five years or so...
(Quarterly cleaning is done with a really fat water colour brush and an air brush compressor)
Tools:
Straight Ammonia in a spray bottle (hence the needed ventilation)
An aerator/spray attachment on your kitchen faucet (or get yer butt downstairs to the laundry tub, which is what the significant other is going to tell you anyway)
A vacuum cleaner that you can reverse (move the hose from the front to the back so that it blows rather than sucks. I have a Kirby upright. And make sure the dirt bag is disconnected! I just thought of Curly! Nyuk Nyuk
A crevice attachment on the end of the hose. This reduces and channels the airflow so that you don't blow the models apart, or to the other end of the continent.
The Work:
Spray the model with the ammonia. If you can wear one of those medical masks for breathing, better.
Invert the model under the lightly running faucet to rinse. This is kind of like doing a really delicate set of dishes...
Use the blower-vacuum to dry. Should be about a foot and a half away. Done.
The concerns:
I thought the ammonia might eat off some of the paint (since a lot of them are acrylic paint) but it didn't. So there. I wouldn't try this with a really fresh paint job, it probably hasn't cured yet. Just being cautious.
I sometimes use my airbrush compressor for drying, but the vacuum has more horse power to it. Just go easy with it or you'll blow the model apart (Dracula for instance; has a lot of intricate fiddly parts to it. And that CAPE! Oy!) Keep your distance.
There may be some residual water run-off (these are hollow models after all) but so what? It's only water after all, if you have rinsed properly.
Wow! Did they ever come out nice! The Polar Lights Phantom looked like he was getting a suntan with all the Nicotine film. After, he went back to his old pale self. All he needed was a bath.
Me too, come to think of it.
I hope this helps. If not, sorry. Worked for me. At the very least, you've had something to read for the last 5 minutes.
John