Cpt.Danjou Posted September 30, 2020 Share Posted September 30, 2020 I am about to spray some minis with rattle cans, but the air humidity has risen, and I wonder does that make the paint behave differently? And if it does when is to humid to spray? Cpt Danjou Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/ Share on other sites More sharing options...
Karhedron Posted September 30, 2020 Share Posted September 30, 2020 Spraying in damp conditions can lead to an effect called "blooming". This happens when moisture in the air gets caught in the spray and and ends up on the miniature. The end result is patches with a milky white marking on them. It should be noted that varnishes are much more vulnerable to this effect than colour paints. I often prime my models in the appropriate base colour and I have only experienced blooming here when it is really damp outside. Blooming is not really too much of a problem if you are applying base colours because it is easily covered by brushing on the matching colour from a pot. I normally do a put a brush coat on after priming anyway to get into any nooks or crannies that the spray may have missed. Blooming is only a real problem when varnishing because it has the potential to ruin all the hard work you have done up until that point. This is why I rarely varnish in the winter. I normally save up the models I finish over the winter and varnish them on the first dry fine day in spring. Wakkomaster, Kierdale and Firedrake Cordova 3 Back to top Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5609018 Share on other sites More sharing options...
Firedrake Cordova Posted September 30, 2020 Share Posted September 30, 2020 (edited) Personally, I've never had issues when spraying in humid conditions (I live in the UK, so it drops to ~55% RH at midday in the summer ... it's currently ~85% RH), although I've only ever sprayed GW's satin varnish (I used to prime with a brush - I now use an airbrush for priming and varnishing). I suppose the obvious thing to do is if you're just priming, to spray a some sprue and see how it comes out. Edited September 30, 2020 by Firedrake Cordova Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5609021 Share on other sites More sharing options...
Fajita Fan Posted September 30, 2020 Share Posted September 30, 2020 I've had some awful finishes painting in the American south, the surface is almost hydrophobic on my black orcs sprayed aluminum. Your best bet if you need to prime now is get up really early in the morning and knock them out before it gets bad. Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5609337 Share on other sites More sharing options...
Carlson793 Posted October 1, 2020 Share Posted October 1, 2020 (edited) I've had some awful finishes painting in the American south, the surface is almost hydrophobic on my black orcs sprayed aluminum. Your best bet if you need to prime now is get up really early in the morning and knock them out before it gets bad. Meanwhile, here in Kentucky (especially right next to the Ohio River), you have to wait till about midday for the humidity to "burn off" to about 50%-60% primer weather... if it burns off that day. It's gotten to the point I'm turning to brush-on primers, and those just don't give optimal coverage. Luckily, I've got an unfinished shower in the basement, and if I get desperate can primer down there. Here's an example of what happens when the weather goes from perfect to 60%+ humidity with zero wind in a matter of minutes. Everything else I primered came out with smooth surfaces; this guy ended up rough. Edited October 1, 2020 by Carlson793 Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5609616 Share on other sites More sharing options...
Kain Mor Posted October 12, 2020 Share Posted October 12, 2020 The wildly fluctuation temperatures of Colorado is one of the big reasons I switched to airbrush priming. It’s fast, easy, and I can do it whenever the urge strikes me. Kierdale 1 Back to top Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5616031 Share on other sites More sharing options...
BLACK BLΠFLY Posted October 13, 2020 Share Posted October 13, 2020 Having lived in Floriduh for 15 years I can vouch there is no humidity in UK. If the air is humid the paint will start to solidify before it hits the model... it looks like crap and is hard to remove. Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5616634 Share on other sites More sharing options...
NiceGuyAdi Posted October 13, 2020 Share Posted October 13, 2020 BBF when you say there’s no humidity here in the uk, I just looked at the humidity and it’s over 90% (And 11°C). But it’s almost always from people in the states I hear that you can’t rattle can prime in high humidity. Is it actually a combination of high humidify and higher temperatures? Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5617214 Share on other sites More sharing options...
MithrilForge Posted October 13, 2020 Share Posted October 13, 2020 I think it's super funny how people brag about how super humid it is where they live and blah blah blah... we used to get it from Tourists who visit down under... "yeah that mountain is nice but back home we got a better one, ya hear me?"... anyway back on topic... if I had that kinda humidity i'd try and spray in the garage with either a fan or heater...or whatever will bring you back to good spray weather ... and sit your spray can in very warm water for 10 mins before you spray anyway... that always helps keep it smooth. Mithril Bryan Blaire and Karhedron 2 Back to top Link to comment https://bolterandchainsword.com/topic/366748-rattle-can-spraying-and-humidity/#findComment-5617221 Share on other sites More sharing options...
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