This listing is for various PVD (Plasma Vapor Deposition) coating services that are available. These services can only be performed on steel, stainless, or titanium components....No aluminum, it will melt.
Tropical PVD coating can vary and there is no way to predict the outcome. See pic of large batch to see common color variations based on rack position. You can request a specific rack level, but color outcome may fluctuate.