Ditto on the gun blue. Per 68Z build thread.
Also used it on driveshaft/yoke welds, and as touch up on dark phosphate fasteners. The little bottle goes a long way.
My first trial I had some flash corrosion appear, took about five minutes to redo, then wiped it down with rem gun oil, no corrosion, and it has been a few years. Humidity was probably the factor.