Springwood Workshops, Huddersfield, England has an interesting page on
the ethics of musical instrument restoration and conservation. While
the page is specific to the organ, I think that it has information
which may be of value to harpmakers and those who wish to maintain
their harps in the best conditions. The page can be accessed via:
http://www.netlink.co.uk/users/musick/docs/ethical.html
Considerations for the Ethical Conservation of Historic Musical
Instruments
Ed Margerum
emargerum@mecn.mass.edu