Has anyone tried milk mouth?

I have a maybe stupid question but here goes. When I fed my son as a baby it took him a few seconds to swallow enough to get all the milk out of his mouth. I so thought that was sweet. I was wondering could I paint the paper glaze or varnish just a little along the gum lines and such to mimic this? With some whitish spit bubbles I think maybe I could reproduce this look. I was wondering could I add some paint to that prodcut or should I experiment with something else?

That’s a great idea

Thank you so much I was just not sure if I added color would I change the chemical make up of the substance and mess it up