Detail tricks
Fishnuts,
I will tell you a little detail secret that I just love to use.
First of all, whenever possible use a metal etching primer for your small parts. You can buy it in a spray can at the local jobber auto paint source. It will allow for much better bonding of the paint material to bear surfaces.
Sandblasting is great, but I also get a lot of mileage out of a variety of wire wheel brushes on the drill motor. It is not so messy, works well on small parts, and does not risk the damage sandblasting can cause.
Okay, here is the trick. After you have primed the small parts, get a spray can of Builder's Cast Iron spray. It has a dark grey metalic color and simulates fresh cast iron. Follow that with several coats of clear spray. The final finish will amaze you. It is not as durable as powder coating, and should not be used in high wear areas. However, it will provide an awesome look to hinges, bolt heads, small brackets, suspension parts, etc.
Have fun.