Seems that todays "standard" of personal identification of tools is with an engraver.
I have been noticing more and more, traces of paint on....handles (in the knurling), and sockets (in the knurling) of either red, blue or white paint. I've not seen other colors.
I have seen it on Plvmb, SK, Husky and others. Was this a commonplace method back in the day? Sure, I have seen the haphazard blast of paint on newer used tools (mostly electrical), but this observation on the old skool hand tools seemed very precise, or.....the paint has worn off to the remainder of the knurling.
Thoughts?