"Humidity levels" Topic

I've always lived in places where humidity is not a factor but I know that it causes all kinds of problems with primers and sealers.

Is there roughly a humidity level that is safe too apply all the aerosols we use with out causing the texture problems associated with it?

Humidty is a problem for clear sealers. If you spray when humdity is high it will frost the figures giving a dusty look. This can be corrected by re-spraying with the sealer in a low humidty area. Don't spray outside on muggy, sticky days. Here in the deep South I avoid spraying in the summer or on those muggy winter days preceding the arrival of a cold front. The gritty primer surface is caused by spraying in the heat. The paint or primer partially drys before reaching the figure and causes the gritty surface. I spray outside in the summer only in the early morning while temps are less than 80F. It is plenty humid then but that doesn't affect primer or paint.

I'm in the Pacific NW, where it isn't so much humid as rainy sometimes. That said, I recently had a project get a little "frost" coating using Krylon matte. I didn't think it was too hot or humid; maybe I sprayed it on too thick. What I usually do is spray clear coats (gloss or matte) in my covered garage. The temp & conditions in there are stable enough year round. Never had problems doing it in there.

Some of the cans of aerosol paint I have say to use it when the humidity is less than 85%.

For the cans that only say not to use them in high humidity I use 69% humidity as my cut off point.

Or you can simply go outside, spray, and then immediately bring them inside to dry. In 15 years of model and miniature building, I have never had a problem. 6 years of that was in Central Florida and 10 years in Northern Ohio.