You can also use dormosedan gel sublingually. It is very effective.
Originally Posted by ecrklaveness
Ihave you considered boots, glue-on shoes or easyboot glue-ons?
Used together, for 2~4 shoeings, this would be my suggestion. The Dormosidan to keep him calm, and the glue-ons to get him to understand his foot isn't going to hurt every time. Once the foot has healed, back off the sedation, and once he'll stand for a set of glue-ons without sedation, reintroduce him to the idea of nailing. While glue-ons are expensive, they cost less than the vet visit in my experience.
Also, if this has been going on for a while, have we done recent radiographs or an MRI to be sure the infection hasn't gotten into the bone? That can be a big cause of ongoing pain issues.
The Great White North, where we get taxed out the wazoo
Along with your handling, the bute etc, what about using a clicker with the treats when he is being good? maybe don't give him his breakfast, so he is looking forward to the treats even more, and like a previous poster suggested use a hammer to tap/bang his feet, click and reward when the behaviour is appropriate.
Barring that, I don't think the suggestion of another farrier is a bad one..other than the PITA factor might be worth a shot.