My Reccomended Rust Converter

Over the last 4 years I have achieved excellent results with Ranex Rustbuster.

http://www.bondall.com/rustbuster/Ranex_Rustbuster.html

Its a clear liquid that can be brushed on, or in my case soak the part in Rustbuster for up to several days. The finished surface can either be wire brushed before priming or left to dry prior to painting.

The first time I used the product was to clean out the rust from the engine block cooling system areas. I completely filled the block with Rustbuster and let it sit for about 1 day then flushed several times.

Rustbuster can be re-used time after time, filtering through a cloth after each use.

Below is a before and after photo of the same part, which is still to be wire brushed.

Here are some more before and after shots

Applications that I have used Rustbuster on are

Steering Wheel Frame
Steel Radiator surround
Radiator surround inner panels
Water Pump Housings
Engine Block
Thermostat Housing
Windscreen Surround
Brake Linkages
Transmission Gears
U Bolts
Various nuts and Bolts

And probably more I have forgotten.