The antiseeze is there to prevent the plugs from getting seized in the motor. When they are taken out after being in there a long time, the plug is seized to the threads in the head and when they are coming out, the threads are weakened. Then you put the plug back in, and a few miles later they back out, or blow out. People literally say to use a dab of antiseize. So..don't use the brush they supply you with, use a tooth brush and just barely put any on there. That way, next time you pull them out, they won't be seized in there.
I am on the fence with antiseize because I haven't changed them in a 2V motor. I had thetuner change plugs on my 96 Cobra when it got supercharged. I didn't have any problems. I recently called them so ask if they have had any problems with them blowing out, and he said they have never had one blow out of a Mustang. (They have been in business since 1990 and supercharge and build Mustangs everyday.) But they have heard of it in trucks. They don't use torque wrenches either, they just change them like any other plug. I am still on the fence....maybe I should just have them do it when I get it dynoed and tuned...then they will be responsible.