How do I do glass window painting?

Martha Stewart has paint made specifically made for glass.

Here is one idea to get you started: https://www.hometalk.com/diy/craft/holiday-crafts/patriotic-painted-glass-bottles-3911487

Patriotic Painted Glass Bottles

Hi! maybe this will help

https://www.ehow.com/info_12061876_can-acrylic-paint-used-glass-windows.html

Hello. They have decorative clings to place over plain glass.

Also alternatively-there are crafty methods to create faux stained glass for indoor display.

These Faux stained glass projects links might be worth a look.

https://www.hometalk.com/diy/windows-doors/windows/s-19-fantastic-techniques-for-faux-stained-glass-38444776?

https://www.hometalk.com/diy/paint/cabinets/combine-elmer-s-glue-and-acrylic-paint-for-this-one-of-a-kind-cabinet-42051118?

http://suzyssitcom.com/2011/01/feature-friday-faux-stained-glass.html/2

I hope this helps!

This is one way to paint a window: https://www.youtube.com/watch?v=DbquwY6HhBk

This post shares a recipe for washable window paint: https://www.catholicicing.com/how-to-paint-temporary-stained-glass-on-windows/

This post also shares how to use washable paints. If you don't use washable paint, you'd have to scrape off the paint when you want to remove it: https://holidappy.com/holidays/Christmas_Art_Painter