I bet that if you borescope each cylinder You will find some visible scoring - this is where your oil consumption was coming from.
Even though visible, those scratches are filled in with the "glass-like" substance/layer that Ceratec seem to form.
I did have luck on a couple of my customer's scored engines using Ceratec, per their request, and it does seem to work and hold over time.
I have to admit, I was sceptical, but it worked and saved them expensive engine out rebuilt.
Also, if used as directed and the used oil is drained with the engine properly warm/just driven, there does not seem to be visible separation or excessive product leftover. It seems to be a good product.