Get "Mouse MilK" from Cascade Aeromotive, Troutdale, Or. Great for dis-similar metals/materials. Used in aircraft. Thanx Lloyd KK7IZ Please visit my web site http://www.lloydsdipsydumpster.com/ Lloyd Godsey KK7IZ 1315 N. Udall Circle Mesa, Az. 85203 480-620-7145 (cell)