Editing Rust

==Notes==
*Rust encapsulators are common in the hotrodding industry. Some feel that they won't get rid of a problem, and may make it worse.
*Some people feel that minor surface rust of body panels is treatable, but everything else must be cut out and replaced with new metal.
*To remove surface rust, use naval jelly and steel wool.
#Work in small areas, not larger than a square foot.
#Apply jelly with 000 steel wool, rub it in, and allow it to set for a couple of minutes. Don't let it dry.
#Rub again with steel wool. Repeat a few times, and then clean the area. Dry it immediately.
*Body panels can be sand blasted. However, it must be done carefully (explain). The pressure of the sand hitting the body panels causes warpage.
*There are so many different products and approaches for handling rust, that it can be mind-boggling for an average hotrodder.
*Some people mentioned that professional body shops don't use POR-15 or similar rust "encapsulators" because:
#They would have to re-do too much of their work.
#Rust prevention products are primarily advertised in hobbyist mags, not in periodicals read by professionals in the paint and body industry.
#The lack of rust preventive products in non-hobbyist industries does appear suspect. For example, why don't ships at sea use POR-15?
#The major paint manufacturers like Sherwin Williams, PPG, and DuPont don't produce a POR-15 like product. This is thought to be because they couldn't possibly warranty such a product.

The fact that POR-15 is not used by manufacturers is also important.

*Can sandblasting "increase" rust? Or, if the rust is removed and the metal is sealed, shouldn't it be eliminated? Some thoughts on this are:
**Although sandblasting may appear to have removed all the rust to the naked eye, it hasn't really done so.
**It's caused by water in the air compressor line, as sand will harbor some moisture. Also, compressed air contains moisture. And, sand has salt in it. A moisture trap in the line should solve the problem with the water in the air line.
**Even high grade epoxies and finishes are not 100% impermeable to water and air.


*POR-15 is largely considered a "duct tape fix" or a "git-er-done" solution. It may be OK for the home hobbyist, but it's not considered the "right way" or the "professional way" to handle rust.
*Brands: POR-15, Zero Rust, Eastwood Rust Encapsulator. These are not rust "converters", they don't alter rust, etc. They are a coating intended to seal out air and moisture.
*Another argument against rust "treatments" is that many of them require the surface to be lightly rusted first. "Inducing" rust seems wrong to people.
*Rust-protection products can either act as a coating, or as a sacrificial anode (explain).
*Sand is not recommended for media blasting panels. It acts like little hammers, warping panels with by compressive forces (analagous to hail). Use softer media (list examples).

*If POR-15 and similar products have a "lifetime warranty", explain how guarantees like that don't involve labor costs, losses, or other related costs.
*One recommendation is: after sandblasting, remove some more of the surface metal by sanding with sandpaper. This is done to remove the salt, sand, moisture, etc. from the surface.

*After preparing panels, coating them with epoxy primer is recommended.
*Phosphoric acid or muriatic acid are recommended as well.
*Rust forms so quickly that if you are sand blasting, media blasting, etc., the surface rust will begin to form before you finish the job.
*Many panels have seams, hems, and bends that are inaccessible by blasting, and hold moisture and rust.
*Why do older cars rust more quickly? Theories are:
**Cars are more aggressively coated these days. Galvanizing (explain).
**Steel used in cars is of a higher quality these days.
**More salt is used on roads these days.

Links to review: http://www.tfhrc.gov/pubrds/novdec98/laboratory.htm , http://www2.sherwin-williams.com/im/cs/cs-spring2003/feature-01.asp .

==References==
*[http://www.hotrodders.com/forum/rust-what-acceptable-permanent-ways-get-rid-47303.html Acceptable ways to handle rust], ''Hotrodders Bulletin Board'', September 7, 2004.