After many tries , have found a paint for Disc calipers and Master Cyl . Rust Oleum makes a flat black engine paint . SKU #20066 18656 .When dry The brake fluid will not harm this paint. Looks great when done . Also the Caliper bracket can be painted with Valspar Metallic silver SKU # 71915 23298 .Have painted many other parts with this silver .It does not look cheap when done . You must use Aluminum primer.