That is unfortunate... what was the formula for you toner... are you going to try a platinum toning? You certainly piqued my interest when you mentioned the possibility of the replacement of a provisional silver image with Pt... So this afternoon I perused sections of The Platinotype by Abney (I am sure this is old hat to everyone but me) ... there are toning processes mentioned in that book and others that certainly concur with your theory of silver replacement..... Perhaps you will have the inclination in the future to try again with different formulas. Thanks for the update.