I recently sculpted a huge figure from a white pine log. I used an oil-based walnut stain and was not totally happy with the results. I decided to augment parts of the piece with paint / wash / glaze. I have tones of acrylic paint - both craft and artist grades - but I don't know if I can use this over oil stain. Do I need primer? Do I re-sand the areas? Or should I use oil-based paint? Any suggestions would be greatly appreciated. Thanks.