I use a rich red with sparkly stuff in it. I use Nikko pen on the legs though. That needs redoing frequently as I spray the legs with rp7 from time to time to protect them from the weather.
I also mark the draw tube of the focuser with the focus points of my various cameras, eg 550d with flattener, 550d with power mate, spc900 with focal reducer etc etc
It sure saves a lot of frustration and time.
