I am a cosmotologist and I found it necessary to "mark" my professional tools to ensure they didn't "disappear" !
Anyway, I tried permanent markers, nail polish, paint pens, you name it, I tried it! Then while walking through walmart one day, I saw the Answer to my problems....Printed Duck Tape!! OMG, I couldn't believe me eyes...I did in fact do a double take! And it didn't take long to choose which roll I would buy, the Flying Pigs of course...I've always been crazy about pigs, and everyone who knows me, is fully aware of my little Pig Addiction..lol. So I bought that Flying Pig printed Duck Tape, drove straight home and proceeded to "mark" all of my cosmotology tools and implements. Worked perfectly and definitely deters anyone from taking my tools.