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The emissivity (of infared radiation) depends on the color of the surface. Black loses heat fast, silver retains heat longer. I remember hearing somewhere that a flat black surface is 10 times more efficieant at allowing heat to escape than a polished surface (no source of info). Which makes me wonder why people get billit calipers that are shiny. But then again, porsche paints theirs red, corvettes are left natural aluminum color, mine are rusty.
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In a fit of 16 year old genius, I looked down through the carb while cranking it to see if fuel was flowing, and it was. Flowing straight up in a vapor cloud, around my head, on fire.
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