So a little searching online and some thinking and I came up with the idea to frame the windows with square silver tubing 0.4mm wide. I wanted a little depth, but anything much wider would, I think, be too heavy.
The guys at A&E metals (www.aemetal.com.au) have an incredibly fast turnaround and from thinking about it on Wednesday and ordering online Wednesday night, they had rung me on Thursday with a question about the lengths I wanted it in and it arrived in the mail on Friday!
So putting the frames together was not as simple as it should have been (are you feeling the theme here?). After several attempts, I think the major problem is the small torch I have been working with (butane), which has been fine for the small silver metal clay and soldering applications I have used it for. However, with the larger pieces of metal that are a bigger heat sink, I just can’t get the temperature hot enough with this torch to melt the solder.
I knew I would need a bigger torch for the glass work, but it looks like I will need it for this also.