Just a thought.
I think that it would be a useful feature to be able to lock your own buildings from being polished or motivated.
This enables you to be able to control what you would like to be polished or motivated by your fellow guild members and/or other players.
So for example, if you have constructed your city to be self sufficient for 120% happiness, then it would be better that you could lock all the buildings that can be polished so that when anyone visits your city, the only buildings that can be touched are your supplies.
We can do this two ways.
First, either 2 buttons which say lock/release all supplies and lock/release all happiness buildings
Each individual building has its own lock button.
The first is easier for the developers to build into the game but its quicker to implement ingame, the second is more flexible for the community to control but takes longer to manage