I prepared a Picture cum Papier mache on a Ply Board (ie instead of drawing I used papier mache to generate the picture).
After finishing the picture I used a solution of white glue+water+titanium white acrylic paint to coat the surface. after drying it for some days I gave it two coatings of linseed oil on it. Now I wish to paint it in acrylic medium. I understand that it was a mistake on my part to provide such a coating of linseed which now refuses to dry.
Is there any way by which I can revive the surface?

I have learnt much from the discussions in this forum altough I am rather new. I hope to find my answer.

Thanks to all