PPF...... I seem to recall the firm who did mine told me to use isopropyl for scuffs, sparingly. As Dave W said, don't go mad.
Hair dryer was for helping remove the film, starting by slightly lifting a corner a teeny, ween amount and playing heat beneath.
I'll try to find details, a firm in Melton Mowbray did mine but it was almost 20 years ago.
And yes, I did buy a pie!
