I really hope this is Wyatt's idea of gallows humor. I'm not a big fan of the escalating punishment, particularly when it's only an increase in severity of something that hasn't worked so far. If the belt turns out to be not as bad as Wyatt feared, then where do I go? It's no good saying I'll continue making the punishment harsher until I stop his behavior, as realistically, there are boundaries I would not and should not cross.
I think before I proceed to punishment, I'd better make a serious effort to find out why Wyatt has continued to do whatever it is he is doing. Unless I can find out why he's disobeying, I'm probably not going to get far. Assuming that I have a good relationship with Wyatt, and assuming that I succeed in finding out what is behind the misbehavior, I can find a solution. Is it a peer pressure problem? Am I being a hardass about something that matters deeply to him? Is he feeling rebellious for some reason?
Having promised him a whipping with the belt, I will carry out the promise after we have resolved our problem. He can take down his jeans and get three hard licks on his underwear, which should make him respect the belt but not overwhelm him.