Re: Black paint
Just an opinion, go with the livestock safe. You're only painting the OUTSIDE, right? Many of us here in Western WA paint our hives dark colors with no thought of painting them white for summer. With average summer temps in the 70's (and 90-100's extremely rare), white paint here is for traditionalists, not bee safety. "Oops" paint of any dark color is common used, especially greys, dark greens and blues, in these parts...
I don't keep bees, I tend bees. Does this make me a beet?
Sea level, Puget Sound, USDA 7a-7b