I would macerate it, too. If the meat is really dried on there, it may take awhile to loosen, but it'll be worth it. My brother's girlfriend found me a cow (we think???) skull and it had quite a bit of jerky on it. I soaked it for 3 weeks because I wasn't too worried about it and kept forgetting to take it out (though, i did partial water changes whenever i remembered it and didn't feel like messing with it too much), and then scraped the jerky off with a sharp knife. It's all dry now, and I haven't even felt the need to whiten it. The sun did a fine job on it, however long it was out there on the desert.