I picked up a jug of the nickel Permatex back in my days of wrenching on aircraft, and still have much of it all these years later. Brush is a little frazzled looking, but there is still quite a bit left, even after using it on everything that I knew that I would have to take apart again someday. Spark plugs and shock bolts are a good example. Only takes about two or three molecules to cover everything in the immediate area and doesn't react with any kind of steel or aluminum.