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.
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.
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.