Acetic acid as is used as stop bath helps to clean those hard water deposits. On the road On 07/05/2012, at 15:56, Bob Younger <ryounger@xxxxxxxxx> wrote: > I've found that hard water stains are really hard to get off the film. ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.