We've tried painting her green but it really didn't work.
Seriously, mum spent most of Sunday covered in green face paint and using net and metallic face powder to produce a scaly look. It didn't work all that well, then my dad (I've always wanted to do this) had a go. The results were... unique.
I'm working on a mask and trying to model it to match the contours and the lumpy scaly bits you can't do with face paint.