July 30, 2020 10:07 AM EDT
I use since more than 50 years very successful Wall-Paper-Glue. Make at first a thick solution, and thin it than with desilled wator so as you need it. Thicker solution hold very strong cloisonné-wires on steeply areas. very strong thinned it is perfect for spraying and holding enamel powder also on vertcal sufaces. Spray at firs a thin layer of thinned wallpaper glue to the metal, powder an also thin shift of enamel over this. than spray again only so much glue, that the on sieved powdwer get moistered. Than again enamel powder. If nescessary a new spray and a new powder sieving. mostly are 3 times well. At last spray glue again, so that the on sieved enamel is light dump, but not wet. Dry and fire.
Good luck
edmund