I wished I had saved it but there was a twitter post that proved a laser doesn’t burn anything blue. There were pics on another twitter that showed the houses with blue roofs and blue umbrellas were not burned. I’ll see if I can find them.
See post no. 588 for link to a video showing blue house and blue umbrellas. Hat Tip to Sheep Whisper.
There may be some form of laser or locator/rangefinder/targeting device that bounces off “blue” but the industrial lasers I use don’t care what color the work piece is. When that stinger comes down-—whup, there goes another two inches of steel or whatever else is laying on the table.
Yes, seems obvious. See post 602.