I love the smell of leadlight cement in the morning...

One of the worst aspects of working with leaded glass is the cementing of the panel. A viscous, gooey, black gunk (traditionally made from whiting, boiled linseed oil, soot black and white spirit) is forced between the lead cames and the glass. In theory this waterproofs the panel, and adds a little strength. In practice it covers me in viscous, gooey, black gunk and makes me smell like I bathe in white spirit.