Oh ive done the hairdryer method.. its a bloody awful way to remove Mylar, it still takes fragile paint with it and if you heat up for too long you can actuall melt the paint underneath and it comes off like treacle.
I use the White Spirit method cos it dissolves the glue rather than soften it like the hairdryer. Bit by bit, with white spirit, mylar just slides off, even the most fragile of paint is left attached to the PF still