OK.... I did the Ship-Shape thing with all my natural hair brushes. Easy peasy. I could have used a gallon but I did 2 gallons and you remembered correctly... 3 tablespoons per gallon. I used a sous vide tank with graduations I already had on hand.
I used my SV Turtle Shell and I'm happy to say, on its 4th outing, along with the Ship-Shape cleaning, any signs of scritch, as slight as they were, are gone. It feels just like my Cocobolo at this point... and neither of them are quite to the used Oak Bog level but are already approaching it.... 4 uses each. I'm guessing, if Doug's guess was right, it has around 16 or 18 uses.
I used my SV Turtle Shell and I'm happy to say, on its 4th outing, along with the Ship-Shape cleaning, any signs of scritch, as slight as they were, are gone. It feels just like my Cocobolo at this point... and neither of them are quite to the used Oak Bog level but are already approaching it.... 4 uses each. I'm guessing, if Doug's guess was right, it has around 16 or 18 uses.