Also any ideas how to keep the stainglass shine. I just rinse the piece, pour or spray ammonia on straight, scrub lightly wih a soft kitchen brush, rinse well. I usually then wash with Dawn dishwashing liquid and let the piece dry before using patina. If you leave a piece unpatinaed, the ammonia makes it shine like it's been plated. I also use it to neutralize Patina.
Some people use baking soda.
It often deposits in the crevices of a panel whether you use it powdered or in solution. Don't be afraid to WASH stained glass with a neutral detergent during the finishing steps.