That's because torrefied wood has a very closed cell structure. Half of the mechanism for drying TO is penetration into the open pores or cells in the wood. If you're going to use TO on roasted necks then apply it thinner than normal. Buff between each coat for longer than normal, wait between each coat for longer then normal....... you get the idea. Frankly I don't see why torrefied wood even needs anything more than a light buffing of wax. I wouldn't put wax over anything done with TO until at least a month passed even on a normal neck. Semi-Oxidative drying oils, which TO has can take up to a month at times to polymerize.