instead of using petrol and and a scraper you can also buy a tool that we use in the paintshop called a caramel/toffee wheel (called this due to smell) which is a drill bit that removes adhesives etc without damaging the paint and is a good little tool if you do this often.
I have attemted this and followed the tutorials, tried everything including hot water, tar remover, heat gun and literally put in hours of work for one section! yet the glue will hardly budge and I have only got about half of it off. Can anyone confirm a toffee wheel would be able to do a better job at this before I buy one ? Or il have to stick the trim back on
EDIT:Scratch that, I have found a way it just requires alot of elbow grease!