Painted candle WIP

I love the idea of painted candles, but I have no idea if they are safe to burn. I had heard that normal acrylic paint would adhere to the wax if mixed with something called adhesion medium, but my local craft stores didn't carry it. I decided to test out this acrylic paint that is supposedly able to adhere to glass and metal among other things. This is after 2 coats of green. I'm planning on touching up the logo with white paint once I'm finished with the green.