[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. No ...

Many hobbyists and hackerspaces have the $500 Chinese 40W lasercutters which most of us know are about as successful at etching metals ... without the mixture. Stainless steel is an alloy of ...

Stainless steel seems like it would be difficult to get dirty, but that's not really the case. That is, unless you're using ...