Hi all, I noteced a couple of threads advising different methods to remove the door strips. Just removed mine using this stuff and it works wonders 
It's really just an Italian household de-greaser (should be available in UK though, keep in mind i'm from Malta) but made the job really easy. I did use a heat gun to soften the glue and paint before actually removing as well, but getting rid of all the sticky adhesive was a 2 minute job
Its also safe on your gloss/metallic paint.
Well pleased with the result
P.S. another tip I'd advise is BE PATIENT with the actual removal of the strips so you don't damage the paint underneath.
Hope this thread helps someone

It's really just an Italian household de-greaser (should be available in UK though, keep in mind i'm from Malta) but made the job really easy. I did use a heat gun to soften the glue and paint before actually removing as well, but getting rid of all the sticky adhesive was a 2 minute job

Well pleased with the result
P.S. another tip I'd advise is BE PATIENT with the actual removal of the strips so you don't damage the paint underneath.
Hope this thread helps someone