For what it's worth, Our enging cover had some letteres written on it, like someone signed it. Duh.......
Yesterday Gary used a "Magic Earser" on it. We are not sure what is in those things but are fairly sure it's involves voodo, spells and a full moon. The writing came off no problem. Other things didn't even start to remove it. So if there are spots that you want to clean up go for it.