Below, I'm applying Canfield Technologies brand Liquid Solder-Mate Flux to the copper foil, using a metal craft brush. These brushes tend to rust easily, so its a good idea to have a supply on hand.
Let it sit for 20 minutes or so, then bring the window back to the sink and rinse it with cool water. Using a soft towel, wipe it down and allow it to dry thoroughly.
Thank you Linda and Ed, for calling me in on this project! It was a pleasure meeting you both .. I hope you enjoy your new window for many years to come!
Please visit my website (click here). Two more projects await .. A lamp repair, followed by (possibly) another clear-with-bevels window. If you are on FaceBook, become a fan and I'll keep you up to date on all my stained glass projects. Call me any time at 201-600-1616 or email me with your questions. Thanks!