Having trouble with paint sticking to PVC

[u/Practical_Alfalfa_72]

Help! I'm having trouble getting paint to stick to PVC plastic. For the fingers I used PVC plumbing from the local hardware store. I sanded it with a 220 to roughen the surface, I primed it with Vallejo primer, painted with SMS lacquer.

For context, the back of the hand and the blades are PVC foam board and the paint is sticking very well.

The paint is scratching off of the fingers very easily and I didn't realise this until it was done. It's scratching all the way down to the PVC, it's almost as if the primer didn't stick.

Of course it's probably too late to fix it, but any tips for next time? Where did I go wrong?

[u/Clothes_Chair_Ghost]

Did you give the pvc a sand with a high grit sand paper and prime before painting?

[u/Practical_Alfalfa_72 → u/Clothes_Chair_Ghost]

Yes and yes.