Update panels with Custom Finish after a bulk finish change
Change project finishes in bulk, then update any panel whose finish source is set to Custom Finish one by one on the panel itself.
When project finishes are changed in bulk, panels whose finish source is set to Custom Finish are skipped and keep their own material.
Panels whose finish source is set to Custom Finish must be updated one by one on the panel itself.
Use the custom source only when no linked finish (such as Carcass Internal/External or Shutter Internal/External) fits.