How do you manage cleanup/refactoring between different environments? (i.e. remo

For refactoring, one approach is to create a separate application that comprises all environment specific objects such as constants, process models and folders whose properties or data values have to be modified to fit the context of the environment. Objects in this application can then be refactored to fit the environment.
For clean-up, you can revert to a previous state of the application by reimporting an application snapshot exported as a zip file at a previous time. This approach however will not remove existing objects in the environment that are unrelated to the previous application snapshot.