is that a Q for me??
The putty is the Warhammer/Games workshop two part stuff. Comes in a ribbon, half blue, half yellow. Mix it together to make a green putty.
(I think you can buy bigger quantities online for less ££ but to be honest I don't use much)
Saw how to use it online.
Mix up the two halves into a consistent green. I took a hard placemat (#A4 sized) from the kitchen and covered it with clingfilm. Then sprinkled some talc on it and rolled the putty into a sheet using a big marker pen (with some talc on it) as a rolling pin. Cut to size with a scalpel. The clingfilm makes it a lot easier to peel the sheet of putty off after rolling. Mold to shape with a cocktail stick or whatever. Take any leftover and roll into a ball and roll another sheet. It stay workable for a while. I found it less messy than milliput.
G