Painting cabinet glass doors???

http://homeguides.sfgate.com/make-glass-cabinet-opaque-37090.html

Check your hobby shops . I know they sell paint for stained glass. You will need to follow directions for prep that is with the paint. Choose a design that will go with your décor. If you don't feel you are artistic enough, go with geometric design. that would the colors in your bath. You can use marker on the back side of the glass to make a template and paint either on the inside - or outside of the glass.

I used the glass paints that T.K. is talking about to make faux stained glass. Laid the glass over a template I made using the computer and printer to copy designs I saw on-line. Used black hot-melt glue to trace the design on the glass then used the squeeze bottle of paint to fill in the design. Worked great.

If you just want to make it a little harder to see inside there are spray paints called "sea glass" that will give a more translucent look to the glass and give you the option of adding color.

there is a spray paint for glass that gives them a frosted look. I would think anything not made for glass would scratch very easily.

This link will give you lots of ideas. Hope it helps.

https://www.google.com/search?rlz=1C1BLWB_enUS700US700&biw=1138&bih=794&tbm=isch&sa=1&q=paint+for+glass+cabinet+doors&oq=paint+for+glass+cabinet+doors&gs_l=psy-ab.3...45872.47833.0.48423.8.8.0.0.0.0.231.1099.0j6j1.7.0....0...1.1.64.psy-ab..1.1.230...0i24k1.0.ey59sKOSB0w

How about frosting the glass? Could you live with that? Most of us would 'kill' to have some glass in our cabinets. But, moving on.......Rust-o-leum makes a spray on frost. I have an outdoor lamp post with a carriage lantern on top. I had it totally re-wired and took the lantern apart. In the process, I used Rust-o-leum glass frost on the inside of the glass panels before it was reassembled. I'm happy with the results. The light bulb itself isn't visible but the light radiating out is. Most cabinets with glass panels have tabs that hold them in. Only do one side, perhaps the inside. When you spray, spray once, let it dry and apply again until you get the look you want.

How about a pretty wall paper on the inside of the glass.

decoupage artists often paint the back of the glass on which the images are glued. This is an example. Just regular paint of your choice is used. For your cabinet doors I would suggest the paint be applied to the inside of the door and if it is not scratched it will work fine. Besides which it would be very easy to touch up if it does get scratched. The glass gives the paint a very nice gleam and is of course easy to clean.

Thank you everyone who took the time to make suggestions :-)

Here's a tutorial that might help - https://chascrazycreations.com/painting-glass-diy-guide-and-tips/