Introduction: Anodized color on an aluminum oil cup include is made out of the cap's own surface area layer, not from the sprayed-on paint film sitting above the steel.
think about the crimson, black, grey, and blue https://atozbookmarkc.com/story22274206/anodized-oil-cup-go-over-shade-could-be-the-aluminum-floor-not-a-paint-layer