[quote name='brensabre79' timestamp='1337849708' post='1666240']
I have no scientific research at all to back this up, but a guitar tech I know asked me this question when I spoke to him about my sticky neck issues. Apparently he was veggie for a while and his sweat increased in acidity, and he knows a few guitarists who are veggie all of whom have acidic sweat. I'd be interested if you can back this up with science though Al!
[/quote]Apologies for o/t, my extensive research shows sweat is at the normal skin pH which is 5.5 - 6.5, ie: very slightly acidic. Although diet can affect pungency of sweat (esp. onions, chillis, garlic) it has no discernible effect on pH. Incidentally if you wash your hands too much with soap which is on the alkaline side, ( normally 8 or 9) this interferes with the skins natual slight acid pH and leads to dry skin issues, but not rusty strings.