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To start, I think acrylics would work the best on glass. Used those for years for reverse glass painting. If you want to do something more transparent, oil will be the better option.

Never paint with acrylics on top of oils. The only water based medium that works on top of oil is egg tempera. But that's a whole different story... although I think its fun to make your own paint!

Haha alright. I’ll be sure to purchase acrylic. I’m planning on painting and then scrapping it off later. So whichever paint works better. I’m sure both couldn’t withstand a razor blade.

Once thoroughly dry, likely oil will be harder to remove... after a year or so of drying time ;-)

Why do you want to scrape it off?

A fun ideas I had. It’s thrilling to see something beautiful destroyed. I may film the entire process.

If you use acrylics in a thick enough layer and then put it in hot water, you might be able to pull the whole "painting" off in one piece!

Ah. That sounds interesting. I got a really large sheet of glass so I’m guessing that I could probably soak a towel with hot water to achieve the same results.

Hm.. never tried that, but it may just as well work. Important with a big sheet of glass is, that heat is applied rather slowly and evenly, so it won't crack...