The outlines will be visible. With professional buffing they will be less visible for a time after each buffing and will eventually be less noticeable. We removed the decals from our 2008 Montana about 5 years ago and I (non-professional) used several products guaranteed to make the ghost images go away. Nothing worked for more than 6 months to a year. The longer the RV sits out the sun will eventually almost even the gel coat out.
John and Elaine. Furry ones, Bubba, Buddy, Barney and Miss Chevious
2017 Tiffin Allegro Bus 40 SP
Know guns, know safety, know peace. No guns, no safety, no peace.