Yeah that is the thing with toaster ovens you have to keep a good eye on the temperature, I've learned this just by doing a couple of pieces in a toaster oven. Most all of your powder is only supposed to be heated up to 375-400 degrees Farenhiet. Having it in the oven at 100 degrees too hot for 15 minutes it probably did kind of burn it, well just made it dull at least. I'm still learning myself so if I'm wrong the other members of the board will correct me.
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