It is no small expense to do what you want (the US seriously needs to lighten up on this kind of stuff...)
If the cpc ever gets in again we should ask them to negotiate canada an itar exemption. Apparently bush jr offered it and then liberal minister axworthy declined.
Just do a form 6 ATF was told by ATF!
My understanding is the Form 6NIA does not allow you to leave the gun in the U.S.A. You must stay until the work is completed.Yeah, but then you have to travel to the US with the gun to get the work done. I did this once to have a gun refinished by Simmons. It isn't the same as mailing it down for the work to be done. That temp import stuff is complicated and requires the paperwork to be completed on the US end too. They won't bother because it isn't worth the headache for them.
My understanding is the Form 6 does not allow you to leave the gun in the U.S.A. You must stay until the work is completed.