You need antiquing medium, printed papers, decoupage medium, (definitely not water based) varnish and your old glass plates. Be careful, you nee be patient, glass painting is hard for the impatient people like me. You need to wait one day on every layer, hard to dry.
Whatever you do on wood painting, you need to do it inverse. First paint with antiquing medium, then decoupage, then paint the color, and finally varnish it. Afterwards, you can wash the plates by hand. Just paint the bottom of the plate if you use it to eat yummy things…
Our plates are elegant and antique now hihi. I will serve Pilav today to our guests.