As I said you need glossy. I forgot in my first post it needs to be oil based. Again I was using Liquid Light but I had similar problems.
I don't think you need 4 coats of the poly. Apply your first coat and wait 1 hour. Apply your second coat and allow to dry for 24 hours. A note on the coating, you are better off to do several light coats rather than 1 or 2 heavy coats. I found if i over applied the poly i had problems. YMMV.