[eternityforest]

PLA only biodegrades fast in industrial facilities. People generally quote years to decades. I would imagine black is probably best for outdoors. I tend to just do everything in black since I'm just going to paint anything that will be seen anyway.

Very extreme heat will affect it, 90 degrees or so will probably not, I have had a painted all-PLA weather vane outside for a few months now, and it doesn't appear to have visually or functionally degraded at all.