Iodine or iodophor stain resistance is imparted to a surface by applying a
hardenable coating composition containing an effective amount of a reducing agent
having a redox potential sufficient to decolorize an iodine or iodophor stain.
The reducing agent reacts with triiodide anion in the stain to change the stain
coloration from a yellowish hue (e.g., yellow-white, yellow or brown) towards a
lighter hue (e.g., pale yellow, white or transparent). This decolorization reaction
takes place over a period of minutes, hours or days, and preferably can eventually
cause the stain to disappear.
