i leave my oil tubes in a clear plastic bin, but ive left it near the window and the sun hit em most of the day... but the tubes are like some sort of soft metal, maybe aluminum? So i mean, i know its never good to put anything in the sun for long, but the paints are in a tube where i think, sun wouldn't really affect em...as for heat. im not sure what that would do to em.
A day? No problem. A week? Maybe. A month of summer? You can still salvage the paint but you would need to repack it. The better art shops actually have empty paint tubes.
I shouldn't affect it, unless it was really really boiling hot then i don't know if it would be very good. (40 degrees+) Other than that it should be fine!
