Black oxide is a chemical treatment for carbon and stainless steel. Black oxide is a durable finish for those looking for protection against chips and dings along with rust and corrosion from chemicals found on the greens. Black oxide can be finalized with a matte, satin, polished or brushed. Includes removal of dents and scratches, stripping of previous finishes, if needed, CNC face milling and color fills up to four colors. We suggest bright colors or the all black paint fills. This putter requires less maintenance than an oil can, but carbon putters will still rust with this treatment.