Have you read any good books lately? can you take ibuprofen while taking aleve As Dr Wallis points out, thermite is used to weld and cut through railway track, which would suggest a door wouldn’t prove too tough. Dr Vincent concedes that it would indeed burn through. However, this is only the case with proper thermite, which is made from a mixture of aluminium and other reactive metals. The iron or aluminium filings in an Etch-A-Sketch could be one of the ingredients of a thermite mix, but Walt would need some other reactive metals hanging about to make it a success.