I've read that others have had the same problem and only solution was to strip to bare metal.I had ghosting of a large previous sticker under the black paint of my then 10 year old el camino when I got it.
It read- Be reasonable do it my way. Friends asked how I did that. Not me.
Color sanded & buffed the paint, it came back.
Gotta disagree, An eraser wheel removes all traces of any sort of vinyl and adhesive. Its the only thing most body shops use to remove pinstripes and decals. Anything large use a heat gun. Real lacquer thinner will soften adhesive enough to remove any adhesive with a plastic spreader. Any final traces can be removed with a real solvent based W&G remover like PPG DX330. It's not rocket science.I wasn't comfortable using an eraser wheel... a lot of effort for minimal removal. Then I would still have to follow up with an adhesive remover.
I've tried GooGone, Turtle Wax Sticker Remover and another water based remover, but nothing works better than 3M Adhesive Remover although
it doesn't come in a red can anymore.