Agree with DG here.  You may have jumped too soon.  As a prolific ceramics freak for nearly 30 yrs have just asked a ?? and am interested as to the reply.  Sorry this has gone pear shaped for you.

P.S. Hand glazed pieces frequently have this problem of uneven glazes.  Most of us dont worry if they are for family or friends.  I know it has nevr worried anyone I have given pieces to.