There are several proven methods of rust removal that will work on your golf clubs. Never apply abrasive cleansers or course textured rags, however. Rust can be removed with simple liquid solvents that may surprise you. Be sure to always wash away the solvents with warm water and a soft dish soap when done.
Soak the iron heads in a tub of cola. Any cola product will work. Do not leave the clubs in the tub for more than five minutes, however, or extensive damage to the club may occur.
After soaking them in cola, remove the clubs and inspect for rust. Chances are that all signs of rust will be gone.
With warm water and light dish soap, thoroughly wash the area of the club that was soaked in cola. Use a dry non-abrasive cloth to to dry all water from the club.
Cut a lemon into halves then apply the natural lemon juicees to the rusted area on your golf irons. Be sure to cover all affected rust area with juice. Let the club sit out overnight with the juice application.
By morning, the rust should have been removed by the lemon juice. Take the golf club, wash with warm water and liquid dish soap, and dry it with a non-abrasive cloth.
Take a brush and lightly scrub over the grooved areas of your club head to ensure that all debris such as rust or dirt is removed.