Don't recall any special prep on the calipers for 69 - so bare cast steel with fresh looking machined surfaces. Possibly the black out as Bob described. Dichromate bleeders, galvanized shield (though they are not in the picture below
, phosphate brake pad retainers, slide pins/bolts dark as are shield mounting bolts. Can't recall this moment if the brake line bolt should have a red dye finish
Hope this helps - please ignore the paint marks on the spindle. They likely don't apply to your application