This paint finish is contaminated with ferrous metal; the black specs show the early stages. As the particles begin to corrode brown or yellow rust rings forms around the particles





Removing Rust Spots



They are usually caused by metallic brake dust that has penetrated the paint film surface and water / acid rain has produced rust. It can be removed with detailer`s clay, followed with a pre-wax polish/cleaner and a surface protection re-applied.



They should be removed as soon as it’s noticed as it may permeate under the paint surface, causing the paint to `bubble` if this should happen the affected surface should be treated with a suitable rust inhibitor to avoid the rust contaminating other areas



Reactivity



[: acceleration of a chemical reaction by a catalyst]



Surface temperature will dictate reactivity (acceleration of a chemical reaction by a catalyst [moisture and heat] the rate of any chemical reaction doubles with every 20.0F increase in temperature



Iron oxide or more correctly ferric oxide (Fe2O3) Brake and Rail dust, like any chemical attacking a surface temperature will dictate reactivity (acceleration of a chemical reaction by a catalyst [moisture and heat] The more heat and moisture that is present (in the form of high humidity, dew and etc) the more aggressive the acid becomes.



Removal



Detailer’s clay will remove most but not all of the iron particulate that is the cause of the rust "blooming", to for a corrosion decontamination system to be effective requires the complete removal of all particulates and the corrosive acids they generate that have penetrated the wheels surface or the paint`s resin system.



Decontamination Treatment- heavy deposits of ferrous oxide will require removal with a decontamination treatment (ValuGuard or IronX) will remove the deposits and ensure against rust formation. Using detailer’s clay with will remove any surface contaminants after the ferrous oxide removal process.



Vehicle manufacturer studies have shown that failure to remove environmental contaminants (like imbedded rail dust, acid rain, industrial fallout and other environmental contaminants) from paint film can cause premature degradation of the paint system. While clay products are useful for overspray, they cannot deep clean the surface and pores of the paint. This can only be accomplished through a thorough chemical cleaning and acid neutralization.



A three step neutralization and wash system formulated to remove industrial fallout, rail dust, hard water deposits, acid rain residue and other forms of pollutants. I would recommend the use of this system for new or new to you vehicles as part of your new car prep

Benefits:



Leaves paint surface uncontaminated for application of wax, polish or sealant. Allows for correct repair of superficial paint damage, reduces buff time on pre-owned vehicles.



ValuGard Decontamination System comprises: 1. Acid Neutralizer, 2. Alkaline Neutralizer - 3. Detail Wash



For badly soiled surfaces use an undiluted citrus-based APC (P21S Total Auto Wash), then use detailer’s clay followed by a pH controlled cleaner (Sonax Extreme Wheel Cleaner) apply a polymer surface protection to ensure easier future cleaning (Klasse All-In-One)

To remove brake dust stains use a mildly abrasive cleaner (Zaino Z-AIO All-In-One or P21S Multi-Surface Finish)



Relevant Articles



1. ValuGard Paint Decontamination System” – http://www.autopia.org/forum/autopia...1242-valugard- aint-decontamination-system.html



2. “Nanoskin Surface Prep Towel” – http://www.autopia.org/forum/autopia...rep-towel.html