I need help with identification

[Jurassic J]

Unfortunately the only information on the fossil is that it is from North America. I was thinking it is a distal femur or proximal tibia but really have no clue. Is it possible to ID the type of dinosaur with just the end of a long bone? Any input would be greatly appreciated. 

[Jurassic J]

sThe previous owner had felt glued to the bottom, I guess to display it standing up. He also sprayed it with some clear coat. I removed the felt and glue, but I am wondering what to do about the clear coat. should I just apply another coat so that it is covered uniformly? Or is it better to remover the layer that is on it? Any suggestions would be greatly appreciated. Thank you.

[val horn]

I might see what acetone does but with out knowing composition of counting it is hard

[Jurassic J]

Thank you for the advice on removing the clear coat. Can anyone narrow down what bone it could be?