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.
Yes, definitely. But for me it worked great. I was fortunate enough to get replacement decals. After removing the old ones, there was a nice shiny area where each piece of decal had been. Made it real easy to properly place the new decals when installing them.
Definitely will show up. There are a few options: - Live with it and over a couple years it will fade to a more even color. - Paint the end caps - Put on a new decal which will break up the area and make it hard to see the discoloration unless you get up close and look for it.