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How to clean Aluminum from glass oven?

Given an electric oven with glass panel over the bottom heating elementA piece of aluminum foil fused to the surfaceSome was removed by scraping with a razoroven cleaner doesnt workSelf cleaning cycle made it worselooks like a deep Al oxide stain in the glass,, How do i remove this aluminum ( oxide ) coating fused to the glass surface?


Household lye (sodium Hydroxide) dissolves aluminum- but be verycareful with if as it causes caustic burns to skin and can blind eyesUsed carefully avoiding spattering and excessive heating, with proper eye skin protection it can be used to dissolve the metal off the glass.

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