tom_krajci wrote:

> But it's easy enough to conduct an experiment. I have scrap sheet
> metal and left over white rustoleum from another project. I can do a
> side-by-side test...unpainted versus painted metal.

Aluminum absorbs less radiation than white paint. Looking up
emissivities you see oxidized aluminum with an emissivity around 0.30
and white paint around 0.90. A perfect black body is 1.0.

Wood is less thermally conductive, making a wooden building a little cooler.

Bud