For the record, vinyl does not always come off. More correctly, sometimes the paint below can be affected. This lettering was in the tropical sun for 5 years in Cabo San Lucas.
Attached in an image of my flybridge with the faint shadow of the original lettering. The vinyl came away, and the glue was removed with Goof-Off and solvent. But the silver shadow left something infused in the Awl-Grip which was so deep that attempting to compound it out was going through the paint--so we left it.
My message is to proceed carefully and be aware that this is a possibility.
DAN