Anything painted black will conceal it better to the naked eye except of course, if you are talking auto body panel work using a gloss black. Flat or satin black tends to be more stealthy. The look a sheen of aluminum draws the eye to it and basically opens up the flood gates of curiosity and questions. Black draws heat to itself so theoretically it should keep the radiator a tiny cooler because it will extract the heat from within to the outside where the black is at. Old Nascar trick supposedly utilizing pigment thermo physics.
The part about "drawing the eye" is so true. One weekend I put on a Moroso underdrive pulley and left it aluminum thinking no one would notice. THE FIRST GUY that walked by at our cruise in commented on the pulley! It came off and got draped in black the next day!
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
