Dull Cote
Dull Cote - I think that was what it was called - was a pressure pack spray for taking the shine off glossy items that could cause specular highlights. The then local federal member was Reg Swartz, who was bald and had a very shiny dome.  A vision switcher, who shall remain nameless, decided that the reflections from Reg's head were too bright, so he promptly went down to the studio and gave the top of Reg's head a quick spray over. He told Reg it was 'make up'.