Worth buying and if stubborn burnt on cooking, persevere 2-3 times.
Yes worked well on my 40+ year old Aga. However, instructions on the container said leave on for 5 mins and re apply if necessary. I found 5 mins wasn't nearly long enough and left 2 nd spreading at least 20 mins and did it 3 times to get off solidified spattering off the surface. Also used a blunt knife wrapped in a cloth - jay cloth or such like or old piece of material to sort of chisel off softened debris. Less old burnt on debris would be easier to clean. Anyway my result was good and left my Aga black surface nice and shiny again.
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