I don't know if stainless can be blued; but, it can receive a similar treatment (like a bake on coating). The only reason that I am not sure stainless can be blued is that my understanding of true bluing is that it is a controlled rust process and I don't know if stainless steel's resistance to rust would make true bluing impossible or difficult. I'm not an expert; but, I'll ask my gunsmith, he is.