Welcome to the forum!!
I have not removed ours yet, will probably do so next year.
Do a search on 3M, and some threads will come up to review.
Two tips that I recall reading:
1) Heat gun, doing just small sections at a time, starting at an edge/corner and working your way over the front end. Believe they used a plastic putty knife where needed to help.
2) I recall one thread where someone used a solvent and soaked an area first, let it sit in, perhaps going over it a few times with say a wet soaked cloth with the solvent? (I'm pretty bad on the memory of the specifics, like what kind of solvent they used. Hope search shows some results on this.)
The last tip, call 3M and ask for Tech Support, and see if they have recommendations.
Be prepared for possible small section of paint being removed as the 3M comes off. Does not happen to everyone, probably more related to how long it is has been on, and the actual condition of the 3M.
Ours was pretty abused when we bought our coached used. I think someone went over it with a buffer and rubbing compound, not knowing that this was very damaging. It removed the harder outside layer, making ours harder to keep clean. I have gound that plastic cleaner, and straight up and down vertical cleaning followed by waxing, seemed to help both on how our 3M looked, and also made removing of bugs at the end of each day a little easier.
Best of luck on yours, and enjoy your coach,
Roo II is our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...