First of all, let me tell you about the possible phenomena that may occur when using the product.
Bell Hammer series products change the composition of metals to reduce friction, so they stain black in the early stages of application. (The black sooty substance will grow into a metal that can handle water, dust, and grease withers.)
Once that condition is reached, it becomes easier to clean and to maintain the lubricating effect of the metal itself after the oil and grease have withered away.
The product with the best track record used by bicycle racers is LS Bell Hammer Gold, and the product with the best lubricating effect is Yamanaka Special.