Thanks for all the replies.
I have never used goof off, or 3m ad remover. But before I do, I'll try the gasoline, even tho I don't believe a word of it. In 60 yrs experience, if acetone don't cut it, gasoline sure won't. But at the price, I'll bite one time !
Actually, I'm not sure I haven't tried gas already. I been at this project for a while now. And my memory isn't getting any better. But I will be back !
On edit, wd, cooking oil and rubbing compound didn't touch it, but I hadn't thought of oven cleaner. I will be back.