Just curious... I usually make several matrices for bromoil printing due to all the uncertainties with the process, usually toss the unused ones.
But will a bleached and tanned matrix redevelop? Kind of hate to throw stuff away, could be fun to play around with, try it in lith developer, etc.
For Bromoil, I use the Gene Laughter recipe, Copper Sulfate, Potassium Bromide and Potassium Dichromate.
When I bleach to redevelop, I use potassium ferricyanide and potassium bromide.
Of course I could just test this, but... inquiring minds and all... I am in now way a chemistry expert!