Hi Janet. If you're painting on glass window panes, I recommend using acrylic paint. You could paint flowers on the panes and perhaps add a couple lady bugs, bees, or snakes too. Good luck Janet. Stay well.

Hi! Hope this helps:

https://www.hometalk.com/28926435/garden-decor-how-to-diy-painted-vintage-window

Garden Decor How-to: DIY Painted Vintage Window

Lightly sand it. You can use any paint. Exterior paint preferred. Acrylic paint will work. Seal with three coats of a water based polyurethane.

I used acrylic paint for mine, but also added 2 coats of exterior varnish.

Use exterior paint and seal with marine varnish.

Hi, Could use Garden colour stain/paints or Gloss paint.

I have found Helmsman spar urethane by miniwax to be the best exterior top coat for wood and concrete. Fast drying to recoat. Use 2-3 coats.

Use an exterior latex paint.

For the frame, I would use spray paint for wood with a sealer. Anything painted and left outside is going to show some weathering no matter what you do. I just like spray paint since it's the easiest to use and pretty durable. I would use regular acrylic paint on the glass and then seal it with a waterproof sealer, as well. Keep in mind the paint might fade in a very sunny area. Hope that helps!

Make sure the paint says outdoor on the can

I used paint with primer in it already. It stays great in the weather.