Does humidity effect airbrush varnish?

[Norm]

I know there can be a frosting problem from using Rattle can varnish on either very cold or humid days - does the same apply to varnish delivered from an airbrush? My Airbrush is set up in the garage, which is joined to the house, but is still quite cold at this time of year (UK).

[modelwarrior]

I spray in a conservatory and using a fan heater let the temp get up to 20 Cel before I do any airbrushing otherwise it all goes Pete Tong. Not sure if its got anything to with humidity but simply things dont flow as well out of a cold airbrush for me.UK as well.

[Norm]

Thanks, I will likely end up having to do that. I have had the airbrush and varnish  in the house for the past 2 days to warm them up, but in the garage the generator would still be pushing cold air through it.

[Byrthnoth]

An airbrush will be affected by humidity and temperature, but not necessarily in the same way as a rattle can, since it also depends on spray volume, pressure/velocity, degree of atomization, moon phase/tides, etc and how all these things interact. I’d definitely do a test spray on something you don’t really care about before risking something you’ve spent a lot of time on. Also, if you have a thermometer and hygrometer, note down the relevant variables with your tests so you know what temp/humidity range produces decent spray results.

[Norm]

Thanks, the UK, like many places is getting variable weather. Last week was unseasonably warm and this week is seasonably cold, so there is a range ‘to play with’.