ART OF STAINED GLASS
Some artisans like to polish their solder lines with fine #000 or even #0000 steel wool. Such fine steel wool does not mark the glass. This practice results in minuscule shavings of steel wool that get stuck where the lead lines meet the glass. These shavings eventually turn to rust powder, leaving unsightly stains. If you insist on polishing your solder in this manner, thoroughly brush your project's solder with a discarded toothbrush or other fine brush. The steel wool shavings must be lifted, they do not dissolve in the water or with soap.
Patina is usually applied on a rag. It can be poured in small quantities directly on the project and "sloshed around" by hand, wearing protective gloves. This method is fast, efficient and gives excellent results.
Your project is best cleaned with a specially formulated neutralizing solution to remove traces of flux and patina.
Some artisans like to polish their work with finishing compound, made moslty of lanolin. Glass has a natural shine, and this step is not necessary. It does give the appearance of darker leadlines. The compound must be re-applied regularly.