Flutes are generally silver plated or nickel plated.
Allergic reactions to nickel are not uncommon, resulting in the
symptoms you describe.
However, it's entirely possible for silver to cause the same reaction
in some people.
I think it highly unlikely that the rash is due to any polish
residues.
There's little you can do to prevent a rash if the player has an
allergy, short of avoiding contact with the metal. To this end some
players stick a piece of fabric plaster dressing on the lip plate,
which prevents any major skin contact in that area.
Even plain old masking tape would do.
Other options include replacing the head for one plated with another
metal, or having the lip plate flashed with a gold plate ( not as
expensive as it sounds ).
Alteratively, have a repairer spray a coat of clear lacquer on the lip
plate ( you could do this yourself, though you must be careful to mask
the rest of the head joint and the chimney..the bit you actually blow
across. You'd need to degrease the area first - lighter fluid would be
ideal for the task ).
This would be a temporary fix though, as the lacquer would wear off in
time and need to be reapplied.
Regards,
--
Stephen Howard - Woodwind repairs & period restorations
http://www.shwoodwind.co.uk
Emails to: showard{who is at}shwoodwind{dot}co{dot}uk
******************************
Got wood?
Check out my exotic hardwood pennywhistles at fair
prices...http://www.Busmanwhistles.com