Oven cleaner is caustic and excellent at getting grease oil and dirt off. But if left it will attack wood softening it. Best option when using it is to wash off with water and vinegar to neutralise any residue. Water will also raise the wood grain so as little as possible is good. Raised grain can be sanded back and waving a gas torch over the surface afterwards to get rid of cut grain will give a surface like silk.
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