Yea, certainly seems to be an adhesion issue. You are getting no chemical bonding, possible due to differences in materials or oil soaking. You are also getting no mechanical bonding, probably due to the underlying paint being old and hard.
I'd say, wipe the area with Prep-Sol or equivalent, use extra thinner in the dope, maybe 40-60 to see if you can get some softening of the underlying paint. If not, you may have to sand it back to the paper finish or strip it entirely.