Well, technically, I airbrush in my garage, but I leave the door and windows open for ventalation (and there are gaps in the wetherstripping around the door) so I am essentially airbrushing outside. I've had no adverse effects due to the climate, and the paint has been curing at normal rates, as if I was inside (with the exception of during a huricane or in the middle of a Noreaster making the curing time extra long)
But, the only problem I see with airbrushing outside is if you live in a climate with freak wether changes (like if it goes from sunny skies with no clouds to a tourrential downpour in 5 secconds flat) What I normally do is I buy a used baking sheet (like a pizza sheet or a cookie sheet) from a yardsale or at the local Salvation Army (or other thrift store) and just place the items to be airbrushed on it. I then take it out and airbrush it, and then I just leave it out in the garage ( I leave a fan going to help with the fumes, but I normally close the door after a minute, to prevent an easy target for a robber)
With my idea of the cardboard box I mentioned earlier, that is something I plan on doing in the future (I'm a cheep modeler, too) but, I'm happy with taking the $0.50 cookie sheet out to the garage for airbrushing.
Here's the first update of my seccond kit for this group build, the Dodge Monaco police car from Hazzard County. I plan on doing it out of the box, but I have scratch-built some extra goodies for it's detail:
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Here's the engine. Nothing to show except for a custom (technically scratch-built?) paint color for Dodge Orange on the engine block. You will see what the pins in the background are used for next.
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Here's the next photo, with the interior. It's kind of comical with it, because the interior looks too small (as if it was compressed during the design process) It also included an arsinal of firepower that would rival a batalion of soldiers (including a Tompson SMG, 2 or 3 shotguns, an M-16, and a Ruger Mini-14) I've seen the Dukes of Hazzard TV show re-runs enough to know that the Hazzard County Sheriff's office didn't stock the cars with wepons like that, so I left them and the gunrack out.
I scratch-built the wires going to the CB radio and police scanner with some more of that lamp-cord I used earlier to scratch-build brake lines on my M-35 truck earlier. I basically just wound it aound a pin, like what could be seen in the first photo. After that, I just painted it and super-glued it to the handset and the radios. The handsets themselves were glued to the dashboard.
That's just about it. I've still got some more scratch-building to come for the car, but not much. Even though I like nearing the end of the build, so I can start to see what I've been building will look like finnished, it leaves me with verry little to multi-task on (like working on both the engine and the interior at the same time). I guess it comes with the territory. I just got to paint the car body, and then do the final assembly, where the last scrattch-built details will come into play.