Thanks for the suggestions, but unfortunately they won't work for us.
I'm sure Bruce doesn't want to put metal on his deck. And we do not have an ex-pen large enough, besides he'd probably jump over it anyway.
I did think about somehow blocking off the deck, but that would require more fencing (meaning $$) and someone to do it. I know Bruce wouldn't want to or probably even know how to do it. LOL
It's just going to have to be more supervision, PERIOD. He's going to have to check on them more often while they are out there. Honestly, I haven't caught him too many times chewing. So I think there may be hope yet. And I'm still going to get more outside toys.

Thanks again everyone. I was hoping there would be something I could put on the wood to deter him.

Oh, some Taggart stats: He is 8 months old today (approx) and he weighs 40.7 lbs.