wow some awesome pics! I can't help but wonder how everyone keeps their hives so clean. Every frame/surface in my hive has a layer of propolis on it.
Mine also...stuck like glue when I try to separate the components. Expect it is a bee thing rather than a beekeeper cleaning effort.
These are both first year hives, they are working on it
So is mine. I suspect that my bees found some kind of propolis jackpot near by and brought it all home.