Personally , i would like to see them restored to factory condition but not concours standard. As well as my interest in WW11 aircraft i also have restored an 1968 International tractor, it has been mechanically been restored to fullworking order and to leave it in its faded and rusty state would detract from the large amount of effort put into it to get it working again, so it has been given an extensive respray.
The same applies to restored aircraft imo.