Safest Rust Remover is ideal for removing rust from fuel tanks.

Make sure you do this in a well vented area or outside
Remove the tank

• Empty the tank completely
• Clean the tank with a good degreaser ( Ultra One Heavy Duty or other)
• If you use 2-stroke, make sure you remove all traces of oil ( brake cleaner) as oil and water don't mix
• Prepare your safest Rust Remover mixture and pour it in the tank
• Close the tank and place it in a warm place (on the radiator or in the sun)
• Turn every 2-3 hours so all the inner surface of the tank was covered
• Drain the solution, filter it and keep it until your next derusting project
• Rinse the tank with water, dry it and cover the inner surface with a proper paint/sealant/product from your bike shop

Have a look at the video: http://youtu.be/u6CWb3O2HYQ