The lead in several windows at Ascension Church in Oak Park, IL had started to bow and buckle.  Since every piece was handpainted and therefore more valuable, the church opted to have them be releaded.

This is a photo documenting the replacement of protective glazing for Apostles Lutheran Church in Melrose Park, IL.

This photo demonstrates the dramatic contrast of a thoroughly cleaned panel, next to a dirty panel. 
Second Presbyterian, Chicago, IL

This church also needed to have its windows removed for a cleaning.

Section of a leaded window from First United Church of Oak Park, IL