Charlie, Darn it that was such a cool picture, too! If you do it in the future and want more details, please message me. I think I gave you the gist of it in this thread but something else might come to mind. You could try sanding that down to the wood to "open up the bubbles" (you may need to poke a few to really open them up and then pour a nice thin layer over the top (it will fill the bubbles especially if you poke them with a pin to make sure no air is trapped with the new pour), then use your heat gun per usual... It might be worth a try....