I bought some acrylic paints today and started to paint the area above the cards. I decided to do this out the back under the patio but after a while I noticed some ripples apearing under some of the playfield. Then the paint started to lift. I am assuming the sun hit this part and started this process. Does this sound like the reason this has happened? The paint in this area was fine before and I didn't do anything with this part of the playfield.
