Yes, you can spray standard WD-40 onto a stiff tap handle temporarily to help penetrate corrosion and free up a stuck mechanism, but it is not a permanent solution. Because WD-40 is a petroleum-based solvent, it will wash away existing factory lubrication and can eventually degrade rubber O-rings. After using it to free a stuck handle, you should clean the components and apply proper silicone grease. Verification: Test the handle movement after application to confirm it turns more freely.
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