"Chrysler Grey" spray paint, "Denis Trickett" RIP used this to touch up old Leak charcoal grey coloured valve amps that passed through his s/h hi-fi shop in Bell St, near Edgeware Rd, London during the 1980's.
Errata: This was the colour match for the Acoustical Quad 11 power amp, scratches balding head, defecting grey again!