Diego from engravers dungeon has developed an incredible technique for laser cutting that really makes their designs stand out. The colours are painted on before engraving but the secret sauce lies in the two tone style of engraving, something that they are understandably keen not to share. The whole thing is finished off with a mixture of wax and varnish to make a nice piece that I would be happy to own.
I make no bones about it, this is some high class engraving even if I am trying to be humerus.
The folks over at CutLaserCut have discovered you can engrave cocoa butter when they made this sign for Lush Cosmetics. The results are margarine-ally better than doing it by hand and you probably want to put something under it to catch any drips, butter safe than sorry.