I am interested in using more than one toner on a single print. I remember reading (possibly in a post about platinum toning which I am unable to find) that the "nobility" of metal in a toner determined whether or not it could replace the metals already in the print. I am wondering how this along with the fact that some toners seem to tone in proprtion to image density (selenium) while others tone evenly (gold). Also, if one were to use an indirect toner requiring the print to be bleached before toning, could this be used in conjunction with other toners such as selnium or gold? If so, how would the image be affected if the other toners were used before, rather than after, the indirect toning. I have limited experience with toners other than selenium so please excuse any errors in my understanding of how they work. Thanks.