Denbob, you need not worry about the bluing or browning solutions you will be using. These will not harm you at all if they get on your skin. The trick to getting good results is to polish the metal uniformly with emory paper, lubed with mineral spirits or kerosene. Polish to about the 240 grit for browning and 320 or 400 grit for bluing. You cannot get really good results with the "cold" solutions unless you leave enough grit in the polish for it to "bite" and work. I have done many gun parts with the cold-blues and entire guns with Laurel Mt. browning and have found out that to work it needs this grit. As for the bluing, you must degrease it with acetone or alcohol beforehand, and do not touch the metal after that except with a clean towel, paper towel, cotton glove, etc. As for Laurel Mt. browning, it will work through fingerprints and even light oil, but needs humidity to work well. This time of year when it is cold and the air is dry, I hang the browning barrels in my bathroom so each shower gives it a jolt of humidity and I get good results.
If you do not feel comfortable doing this or want a good salts-blue, I will happily toss the parts into the next salts-bath I run which is done in my shop about weekly. E-mail me at firstname.lastname@example.org if you want me to do this.