Re: What do you use for anti-sieze?
On a more serious note - you only need a little bit. I check my plug fairly frequently so I certainly only use it with a new plug.
I have Al paste, Copa slip, Nickel, - but the best for plugs? The little stick kind. It's Aluminum in semi solid "crayon" form. Not messy, easy to apply.
Again - too much or on the tip and you'll foul the plug I imagine.