I am just starting a complete restoration oy my 67 non XR7. I removed the gas tank last night which is new and salvageble. I removed most of the gas, but a small amount is still in the tank. Since I anticipate this resto-mod to take about three years the tank will be off the car for some time. Are there any tips or additives that people have used to avoid corrosion in the tank while it sits in my garage. I don't think I need any of the coatings to restore the tank since it is brand new. Thanks for your assistance.