After releasing the lead from the over-cooked coatings, which strangely enough was actually interesting to do. I checked ~100 of 3 coating sessions, these last ones pass the wipe test with flying colours but an occasional one has a flake issue under smash testing.
This leads me to believe that I am very close to consistant success with the coating.
I know Joe reads this thread , So Joe I am proposing to drop my cook temp by 5 degrees.
My Displace and thermo unit says 201-203 at the end of bake time. I think that I am just on the edge of excess time/temp of the flaking limit. Either through the design of the oven or my methology Id like to just ease back a fraction to try and avoid the flaking.
Trev I will be sending you samples, you will be able to see yourself my screw up on the first over cook. Should have them in a few days as I didn't send them via Star-track so you wont have to wait weeks.