I had my 1 year old lab think one of my bows was a chew stick. Had just gotten the bow in the mail, not 90 minutes unpacked. I went out back to shoot, with the dogs in the house. Got a fire call, I' m a vonunteer firefigther. Put the bow down and came back in about 15 minutes. Meanwhile my wife let the dogs out. Came back to find my lab chewing on the bow[:@]. She did a good number on it. I sent mine back to the bowyer and he did a little sanding and it looked great. The only ones that showed were the real deep teeth marks, but you' d have to look close.
I also dropped my new Lil Magnum off the back of the truck while bear hunting last month. Figured those nicks put some character in the bow. You could always tell people that they were teeth marks from a bear you fought off with nothing but your bow.
I' ve heard about the trick you mentioned but never tried it myself. Good luck!