I have used the Saphir rejuvacuir and mixed it with Cadillac Select (lighter than CPR) and did fine with it. I have even dabbed it on solo, as it was intended for use. I can’t come back to much later, but I would love to know which Saphir product you are using in navy. A few people here have used different Saphir products. If you do a search of Saphir, that may yield some info. I am a Saphir fan and want to try a recolorant in green on a pebbled bag!
Saphir rejuvacuir, that is what I have.