Hi Steve, i was guitly of doing this back in the 70,s D T on one side and = on the other.
Also a coloured in alot of white demo,s ie blue and red on the hat on Kapp, the dots on Nite life etc.
I didn,t do it on all just the early days, but all the records i sold to Ian Gillabrand have got his name on and there is alot of them about.
Also owned quite a few with Andy Simpson,s name on and Johnny Mack as well.
Dave