Time for the fingernail test! Great pics by the way!
SLOWLY drag a fingernail over the area. Should tell you if you have somebody's else's paint on your vehicle (which is what i see), because it rises up.
If it feels like an indent, does it grab your nail, or merely 'snag' it?
If it snags or grabs,you need aggresive, professional help. PM me.
My guess is that it would wipe off with lacquer thinner...
Jim