Just as Rugermike stated, refinishing can instantly lower value by as much as 50%. Once you start, there's NO turning back, so be SURE you want to refinish it 1st. Be aware that the bluing solutions you're talking about is cold bluing. Cold bluing is an controlled oxidation produced by chemical reaction only, whereas hot bluing is controlled oxidation process from temperature and chemical reaction. Hot bluing is MUCH better, being both deeper into the surface, and longer lasting. It's extremely hard to achieve good results with cold bluing. That having been said, if you are dead set on attempting it yourself, and want the best cold bluing results using conventional cold bluing, use oxpho blue sold by brownells-
http://www.brownells.com/aspx/ns/sto...le=OXPHO-BLUE~ Another product that gives decent results is blue wonder, a 2 part process-
http://www.bluewonder.us/
When using cold blue, make absolutely SURE you go exactly per instructions, with attention to detail, and make sure it's totally degreased before cold bluing. I still think an professional hot blue would be better.