From the Guide to Eternal Happiness:
Rust inhibitor:
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     If parts are showing signs of rust then apply rust preventerr/neutralizer/disolver. It is good to apply rust prevention spray to any and all parts of the machine housing showing signs of rust; seams, bolts, skids, impeller housing, auger blades, handle bars, dash area and underneath dash, springs, linkages, - - any & all exposed metal.
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·        These agents work differently on different metals, depth of rust, condition of rust, and temperature. Sometimes they will get parts black (excellent protection), gray metal (coat quickly with Rustoleum or oil), or white (good protection which can last from weeks to several months depending on the metal and product). Work rust down with repeated applications with light brushing.
·        Must for Rust spray available at Home Depot. It works very well on some rust but not all. It’s worth the money and easy to apply.
·        Harbor Freight sells a liquid bulk similar to Must for Rust.Â
·        Navel Jell is a jell which can be applied with a ½ inch paintbrush. It dissolves rust very well and leaves a nasty looking white film which is excellent long term protection. This is a better rust dissolver than Must for Rust. It leaves a better protective film than Must for Rust. The white protective coating is ugly but will stay on the machine for several months even through rain. Google Navel Jell with NASA for a shock.
·        Rustoleum jell. Similar to Navel Jell.
·        Once rust is worked down protect the base metal with occasional sprays of WD-40, any light oil or Rustoleum. Most rust removers can be painted over after a light brushing.Â
·        Rustoleum rust inhibiting paint is very available in matching colors for snowblowers in small quantities. Once rust is worked off it’s good to coat it with some protection.
Locite now has a "me too" product like Javel Jelly.
NASA test::
NASA had a problem with rust particles in the wind supply piping to their supersonic wind test facility. Those were 24 inch pipes 15-20 feet long. Rust particles from the pipes were damaging the paint on tested parts. They tried three products to treat the rust. Navel Jelley, Rust Converter and Stainless Steel High Temperature Coating.  All did a suitable job. The SSHTC was eliminated as it required a 15 minute high temperature cure. Rust Converter also OK but Naval Jelly was fount to last longer, cheap and easy to apply with a brush (same for Rust Converter).  Because Navel Jelly left behind a thin film and laster for 4 months it was chosen. Â
    NASA was wiping the Navel Jelly and getting a thin white protective layer. If you don't clean after applying it the coating will stay on longer outdoors. On some old paints that are rusted and dried like a rusted 70's white Tecumseh engine cowlings and carb covers the coating will sometimes remove the rust and brown stain in the paint also. Sometimes it will cause some of the dissolved rust which blackens to lightly stain the paint but that generally looks better than the rust.Â
This message was modified Nov 10, 2010 by trouts2