Rick, Steve, Graeme - thanks all
Well, you may not be so happy with it now.......
I have taken my slightly over the top modulation T34 and covered it in some 'washable white camo' paint that I bought a while ago and have been itching to try out
Rather than go through the chipping medium / hairspray process you just paint over it with what is effectively crap paint that doesn't stick very well - the removal process is then the same water, brush etc
The camera has pushed the green - it is more 4BO grey green in reality
I sprayed the top surfaces with an opaque coat but not too heavy
Left it a few minutes then attacked it with warm water and a scotch pad, brush, brass cocktail stick, foam make up applicators
Looking at the bottle of paint afterwards I noticed that it said leave for a day to dry before removing - oops, oh well