[Brain] wanted to mark some scissors with his Ortur laser engraver. The problem? The laser won’t cut into the hard metal of the scissors. His solution? Smear the scissors with mustard.

Because I can’t stop engraving ... s a diode laser that can engrave way more materials. Per Acmer’s website, the list includes “paper, wood, leather, MDF, stainless steel, some dark opaque ...

[Frankie] and [Bryan] have figured out a way to use the laser to chemically activate ... had no effect at all without the mixture. Stainless steel is an alloy of iron and some chromium – not ...