Glad you fella's asked and happy to oblige!
First, you may have to try, repeat and try again, but you can get good results. I used Brownells Ox-pho Creme Bluing. The liquid type Ox-pho may work as well, but I always have used the creme.
Start with hammer first, as it is easy to get practice on, then you can move on to the frame when you are satisfied with your technique. Clean and de blue your metal. Shinier the better, and degrease with alcohol, etc.
A picture of the setup I put on my dremel tool to shine up the metal. Buy a small wooden dowel about 3/16", cut about 3 inches long, carefully cut a split in one end about a 1/2 inch deep. To the other end, take a small file and and file down a shank to the size that will fit in your dremel collet. Take 1000 very extra fine sandpaper, cut apiece 1 inch long and 1/2 inch wide and slip it in the slit you made on the dowel. Chuck the other end in the dremel. Let the sand paper stick out long on one end of the dowel, and let about 1/8th of an inch stick out of the other side, and bend this short piece against the dowel. This keeps the paper in the dowel while buffing. Run your dremel fairly slow speed and you can polish your metal like a mirror with this fine sandpaper.
Get a cap full of 91 percent Iso alcohol, (Dollar General, Drug store etc.) and have it ready. I take a q-tip or a toothpick or some small piece of paper towel and dip into the Iso alcohol and then into a dab of Ox-pho blue. Then take a quick stab or dob on your metal. A thick glob like a raised pimple of ox-pho blue seem to give the light cobolt blue color. I start with the q-tip first. Use the toothpick for very fine dots, or lay about 1/8 or 1/4 of an inch of the toothpick flat on the metal and roll it in your finger to get a wavy effect. At times you can take a piece of tissue and very quickly "smash" a blob of the OX pho blue and get a good effect. Press and pull away very quickly. Use and try a variety of combinations, and watch the bluing to tell when you are getting different colors. Sometimes use more alcohol to dilute or sometimes use pure Ox-pho blu to get darker colors. Experiment, and try leaving the Bluing set for long periods, very short periods, or wipe off immediately, so you can vary the colors.
Also this is very important, only wipe off your metal with a paper towel, NO STEEL WOOL when your are wiping off the OXpho blu. wipe the metal at numerous times to observe your colors and get back again to work. If you wipe any of the light blue or cobolt colors with steel wool, they vanish and leave only black color. You can also wipe with FINE bronze wool, and it will leave an orangish tint to some areas of metal. I also use common typing paper tp wipe down the blued areas to polish, Just remember, only wipe with a paper towel, typing paper or FINE bronze wool. NO STEEL WOOL or you loose you colors.
Keep working at it until you are satisfied. If it looks bad or you want a do over, simply de blue and de grease/de oil your metal and start again. When you get the look you want, simply set the piece aside for about 24 hours and let the bluing cure or set up. I know it sounds strange, but trust me, the rainbow colors will take a set and get hard. NO OIL, NO TOUCHING, NO STEEL WOOL, just leave it alone and come back later and do this final step
Lastly, this is what really makes your finished work look like a piece of glass that you can see into. Get some Tru-oil stock finish and LIGHTLY put a thin coat on all your metal, right over the bluing. Use a little dab on you finger, or alittle dab on a piece of cotton cloth, NO COTTON BALLS.
Don't gob it on like sap out of a pine tree, like I see some many people do to wood, just a nice thin smooth, shiney coat on the metal. Then set it aside for about one to two days, depending on how long the TR-oil needs to dry good and hard.
It will look beautiful and have "depth" to the finish that you can look into. As always, tru oil can always be touched up easily if a big scratch happens, and it can be polished anytime with a little dab on a cotton cloth, just like waxing furniture.
Hope this helps and works out for you all!