If your really after a satin finish, there are several options. I think dullcoat might make the paint take on an anodized look like your camera, but I'm not certain. Duplicolor sparyed out of the can will not be very glossy when it dries. The teal 34 Ford below shows how it looks with no clear or polish. The one with the shading is Testors Aztec acrylic, more satin than Duplicolor, but its only in bottles so it needs to be airbrushed.