Sure, he'll get angry after he realizes that he's stuck in a 6*6 cubicle for the rest of his days. But you'll get some nice bones out of the deal. :D
I always have my jewelers shop next to an isolated forge. Between them I designate a stockpile of whatever it is I want to decorate. Usually it is room type furniture made of exceptional quality and above made of precious metals (wood is on for the beds). All the really good stuff goes to the decoration room and the jeweler and a smith go at them. My best so far is a 43,000 masterpiece platinum throne studded with about a dozen types of metals and encrusted with about 40 gems.
There is a catch. These stockpiles will also hold already-encrusted items, so only encrust furniture if you are right about to (B)uild it, and only encrust a type of craft if you are ready to trade it, or else the already encrusted items will clog up your stockpile.
If you have a legendary metalcrafter, for example, you could set your gem shop stockpile to metal cratfts with master or better quality, and encrust them as your dwarves bring them in. Once all the items are encrusted, then remove your stockpile, and they will go back to finished goods.
[ March 21, 2008: Message edited by: greggbert ]