*If the internal condition of the tin is critical and the storage times of the unused items are subject to variation, it is recommended that an internally coated product is considered.
If you have a product sensitive to it's presence, you should consider the alternative since we cannot guarantee every tin will be rust free.  The nature of tinplate is that it is a matter of when rather than if the tins will begin to show signs of corrosion.
Individual batches will vary.  Internally lacquered finishes are available.