What are to pros and cons of stripping back Juniper bark to expose the under layer?
If you want to show the deadwood because it is already...dead, absolutely no problems.
If you are talking about jin and shari, stripping live parts of a branch or the trunk to show the wood underneath, care must be taken not to kill a live vein that is transporting sugars and minerals up and down the foliage.
So the best answer is...
It DEPENDS!