After first use of the oven, some juice drip into the bottom plate of the oven and crusted.  I wiped it with a wet cloth and it did not come up.  I used the self cleaning feature and the surface finish turned black and looks as if the finish actually came up because it turned black.  I contacted Frigidaire and was informed it was past the 7 day warranty period and the damage was cosmetic.  I have owned the oven less than 60 days and due to delays in shipping, it has only been in my custody for less than 30 days.
My concern is the self cleaning feature did clean the oven and what appears to be a factory defect, is being treated as the result of normal use.
Besides having a new oven without adequate self cleaning features, it cooks great.