Congratulations! Can't be sure, of course, but looking at your image, I'd say that a thicker coating might be all you need.

re temperature: If you start out with a couple of nested bowls, with the outer one about 5 degrees C warmer than the inner (waterbath) one you have your emulsion in, the waterbath temp will probably hold for the time you require. Make any adjustments to the outer bowl and your emulsion temperature will hold as steady and reliable as if you had an expensive electric water jacket,

Cute dog!