Paint contamination consists of any airborne chemical compounds, ferrous (iron containing) particles, adhesives, industrial fallout, rail dust, acid rain, bird droppings, road tar, grime, tree sap, bugs, water spots, brake dust, road salt, oil, paint overspray, etc. either on or embedded in the paint surface. Some of these contaminants, particularly fresh contaminants, may come off the paint surface with the initial washing. Some other contaminants, however, will actually penetrate and/or bond to the paint and, over time, eat into the clear coat thereby causing pitting, premature clear coat failure, and/or overall accelerated degradation of the paint.
The guys at Autopia.org have a great Iron remover comparison.
Full post here
Here are the contenders!!
just crazy! You can't see this until you chemically treat it!
What do you think? Do you de-iron your vehicles?