<div class='quotetop'>QUOTE(Funky Jedi @ Feb 5 2007, 03:28 PM) [snapback]1412310[/snapback]</div>
Okay, two pages on "Don't spray outside when it's too cold...here are options." Not one post says WHY we shouldn't paint outside in cold temps.
[/b]
Well, as someone who has two models on hold because of painting (and it's -11 here in NYC), I'll be more than happy to explain why you can't paint outside in the fezzing cold.
Two words: Orange Peel.
Almost all spray cans have warnings not use below (about) 65* F. It has a lot to do with the chemicals of the paint. At that temp, the paint starts to seperate. The kicker will seperate from the color meaning the paint will take forever to dry, if it dries at all.
Also, the adhesion goes right out the window. Once the piece you're painting gets cold, the paint will no longer adhere correctly and you'll end up with orange peel. If you're very lucky and you can get the piece inside to a warm area, the paint will settle and be ok. But it's hard to paint for 30 seconds and bring everything back inside. Especially since the paint will stink up the house.
High humidity and high heat have the same effect as extreme cold. High humidity is an excess of water vapor in the air which will inveitably settle on anything cooler, such as the piece your painting. It will also mix with the paint particles. For fun, spray paint into a cup and mix in some water then try to brush it on. High heat may cause the piece you're working on to bleed excess oils from the plastic, causing even more fun with paint that won't adhere, cure or dry.
Best way to paint is with a spray booth in a temeperature controlled environment.
-Fred