My American Strat is a work of art. I have some 6th, 5th and 4th string buzz at the 3rd-9th frets on thse strings. Some aciton and neck relief have helped. Is this a process that should being done is small adjustments. The neck and frets a extremely straight. The buzz, althought slight, is more noticable when using a clean sound with no effects.

I will give my 2cents worth. If the nut slots are cut correctly, and raising the saddles of the effected strings does not eliminate the buzz, then I think you need a tad more neck relief.