re: Haven’t been so successful myself
In no way am I setting myself up here as all-knowing but your question certainly deserved a good answer. So here’s a start.
In my experience I haven’t been so successful at this endeavor. Either my pattern came out misshapen or I managed to get devit. I would certainly spray for devit and if you think your pattern is likely to Spreeead and then contort, perhaps just putting some frit between the existing pieces as a design inclusion might work?
Hope this helps!
Windows listen attentively for the sound of broken glass.