David,
These wings, ARF R/C Spitfire, weren't covered with a quality iron on like Monokote, so I would guess Monokote would be easier to remove? A guess.
First time I removed an ARF covering and as it was said, I used a #11 blade also and just took my time.
Plenty of really tiny pieces but eventually they were all gone.
I cleaned the wing up with Acetone also. It does the job.
Not too shabby when done and, in my case, well worth the effort.
Good luck.