Best rust converter for tiny rust spots on painted steel roofing?
One of my new, bright white Classic Rib roofing panels has roughly a dozen widely scattered, tiny spots of rust, possibly the result of little grains of steel produced when I predrilled all of the panels, although I brushed them away and don’t know why only the one panel would be affected. Each spot produced a small stain that washed away; the actual, dark rust spots themselves are less than 1/16″ diameter. I looked at them with a high-powered magnifier, and they have penetrated the paint, but not evidently any farther. Rather than replace the whole panel, which would be expensive, I thought of applying some rust converter and then painting; bright white is easy to match. There’s quite an array of rust converters out there. Which would you recommend for this application?
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