DIY Electricity-Free Radiative Cooling Paint
NightHawkInLight · Tutorial · YouTube title: How To Make Infrared Cooling Paint (Electricity Free Air Conditioning)
Why it's here
HN points to it as a practical, well-researched DIY demonstration of passive radiative cooling.
What it covers
NightHawkInLight shows how to make ultra-white radiative paint that cools surfaces below ambient temperature without electricity. He walks through the research papers and the household-materials process.