Yes, we offer several post-heat-treatment surface options like gear painting, coating and surface treatment. Standard is plain machined or ground finish. We can also provide phosphate coating, black oxide, or oil dip for corrosion protection during storage and shipment. For special applications, we offer zinc plating or nickel plating, though these require careful masking of critical tooth surfaces. Please note that phosphate or oil dip is included free of charge for most orders. If you need a specific surface treatment, let us know when you request a quote, so we can plan accordingly.