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.
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.