So I started to paint my new GR75s over the weekend and wasn't too happy with how it was turning out so thought, "I know, I'll strip the paint off and try again"
I've painted/re-painted *many* models and have stripped paint off whole armies in the past.
The best stuff I've found recently is called Biostrip 20. It's water based and has caused no damage to a wide variety of models and materials - metal, plastic, resin etc...
However... when I left my GR75s overnight, this is what happened:
Not sure what material FFG use, but this was not what I expected. If you have something you consider as "safe", I'd double check it before risking a model :/