Stubborn Metallic Spots

Alex A

Member
I found this griddle completely covered in thick orange rust, so I'm not sure if I made these marks or not. I didn't notice them until after I took the piece out of the oven the first time.
https://imgur.com/a/Eg9d6No

It has gone through two rounds of seasoning after electrolysis and vinegar bath, and holding at 500* for one hour before the first round of seasoning. After that my seasoning procedure was 225*F 10 minutes, applied Crisco, buffed off, 300*F 10 minutes, buffed again, 400*F 45-60 minutes.

But these shiny spots refuse to accept seasoning. Cooking bacon or whatever won't work because they are not on the cooking surface. Is there something different I can do? Do I just need to season this thing 10 times?
 
It might be helpful to back up with the camera so it can be seen where on the pan these marks are. I suspect they are a different metal, but the views don't indicate if they are in a location where this would be likely.
 
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