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More of asking for confirmation, but humidity effects spraying miniatures.

So, when it's warmer, models go fuzzy, and when it's cold they don't?

Is that about right, or have I got the wrong end of the stick.

Each can will usually contain guidance notes on the ideal temperature and humidity. Too hot and it will dry before it hits the model causing a dusty effect, too humid and the propellent will not evaporate causing mistiness, too cold and it will not dry as easily causing additional thickness.

To a point you can work around these issues by using shelters, changing the distance of the can, spending more time shaking the can then leaving time for it to settle a little before using, and importantly, only using the can in a vertical position. The golden rule is to always do a test piece on some sprue or junk models before starting, and give it enough time to dry that you can see any bad effects.

Sometimes though, you have to put up with bad weather and cant spray that day. My own assumption would be that colder weather is more tolerable than hot weather as compressed gases will chill a can below freezing when expelled for a while (stick a spray can in a bowl of water then vent it to see this for yourself), so as a result there might possibly be higher tolerance in the mix at least for this, but again always do a test piece first.

Where I live the weather ranges in extremes during each season. Right now it is cold and getting colder. I'm still basecoating new models w/ spray. I make sure my spraycan is very well shaken and also heated a bit warmer than room temperature (either immersion in hot water of keep *near* a heat vent for a *short* while, so no worries all you safety marshals, you don't have to scold me about overheated spray cans exploding and killing my family). I have a "painting plank" which is just a wooden baord that I can put my models on. Makes for quick transport, which is important. I also have an area reserved for my spray plank (a collapsible tray). I run out, spray quickly, and bring everything back inside. I put the plank w/ the models on a shelf close to the ceiling to accelerate the drying process. I repeat this a couple times to make sure I have an even coat and complete coverage. This has worked w/o issue for me so far.

Spraying in humidity is almost exactly the same process. Stage before going out, very well shaken can, quick spray, bring back inside ASAP. I put the models in front of a fan to accelerate the drying process.

It's also a good idea to experiment with different spray paints. I have a couple brands that I use depending on the application (and weather). I'll generally use the stuff that has a thinner coat during humid weather, doesn't seem to matter in the colder weather because paint and models are exposed for such a short period.