I think I have tried it all. The results you see in the pictures is from a 24 hour soak in paint remover. I followed that up with an 8 hour soak in turpentine with zero change. Then I tried another 8 hours in mineral spirits, again no change.
What's next? Sandblasting, wet sanding?
I am not sure what these flippers are made of, they seem brittle, so I am afraid of sandblasting and wet sanding.
Any ideas?