No air cond.

Good point.

I think that drying too quickly while spraying is the biggest risk. I think if you aren't comfortable in the conditions then neither is the paint.

mississippivol

Gloss colors, especially lacquers, are more heat sensitive. They dry too quickly to level out.

 

Lacquers can also blush in high humidity.  The rapid evaporation of the solvent lowers temperature of the paint on the surface to below the dewpoint, and water condenses on the surface.  The result is a whitish blemish on surface.

I'm using tamiya and when brushing it on small parts it dries very quickly in lid.

It's 109 deg. here and i was thinking hot enough that paint will dry before hitting model.