Neolube also makes great layout die. If you need to mark up a piece of metal with lines for where to cut or drill, coat it with Neolube first and the lines you scribe with a compass, straight edge, etc. will really stand out.
Prussian Blue grease was the preferred substance for practical jokes. One little tube will cover an aircraft carrier. It isn't really obvious if you coat a black toilet seat but it shows up really well on the backs of your legs and ass. Binocular oculars don't show the blue either but the rings around your eyes are sure to bring some jocularity to the work crew.
Good ol’ Prussian blue……
Bookmarks