I already googled this issue and this is the most helpful article I have found :
Get Rid of Ghost Letters
As I mentioned, vinyl lettering or graphics left on an RV for any extended period of time will leave behind a “ghost sign” image when removed.
You cannot remove these ghosts, since they are actually caused by the oxidation discoloring the area around them. You must remove the oxidation on the vehicle’s surface to match the color beneath the vinyl that has been protecting its surface area from oxidation.
Ghost Off Oxidation Remover does the trick! This product will restore weather-exposed surfaces, eliminating ghost sign images from vehicle surfaces covered by graphics. Just spray Ghost Off onto the oxidized surface, wait about a minute and agitate the area with a soft brush. Rinse from top to bottom and watch the the oxidation flow away.
Depending on how long the lettering has been applied that you are removing, you may need to repeat the application of Ghost Off—we had to do it a few times. That’s why I recommend getting at least a gallon!http://www.liveworkdream.com/2014/10/23/old-rv-vinyl-removal-tips/I know this article answers my question but I want to know if any of you ever had to deal with this issue and is this the only way to handle it?
Thanks again!
