Thanks guys, I did try this with a moc, against all your better advice. The result wasn't too bad. It was a battered at-St driver MOC, creasing and wavy. Low to medium heat iron, didnt really see much benefit with the creasing but the wave had gone completely and it lay perfectly flat and no damage to the print. So was pretty pleased, I'd left it under heavy books to further aid it.
Last Saturday whilst cooking my two year decided to remove the figure from its bubble :shock: and proudly bring it in to me to show me where the at-St driver was having dinner, in a playmobil camper van! My own fault as i'd left it at eye level on the table, initially had to bite my tongue as even though it was in bad shape it was something I wouldn't have done but in retrospect he's had the joy of opening vintage as a child, not that he'll every remember it but a nice parallel to my own childhood.
Dinner went on hold whilst we searched the rug for his blaster! I had a beater figure I swapped it for, so now own a minty at-St driver and a flat cardback!