insaniak wrote:It won't hurt the green stuff, but it may loosen the bond between the green stuff and the model. If you keep everything intact, you can just glue any green stuff parts that come off back in place afterwards.
This
might be easier said than done - I recently stripped my Great Unclean One who had a lot of green stuff to fill gaps (quite roughly sculpted to match the skin) and it did indeed peel off "intact", but I wouldn't for the life of me be able to glue it back on as neatly as it was originally applied.
How extensive are the conversions? Simple Green will definitely break the bond between the green stuff and the model.