Looking again at all of Ian's pictures, has made me want to try out some 'toning' as well - when I've got the time of course.
But re-reading and thinking about it, I do wonder if it is at all possible to maybe tone and then with a VERY weak bleach, bring back some of the papers original colour? Or, maybe even, bleach, tone and bleach again? There must be unlimited variables of time and concentration of all the liquids of course, and copious notes would need to be taken, just in case one effect is liked and wants to be replicated - if it is of course?
Terry S