Rust stains on driveway

Janet Smith
by Janet Smith
My driveway has two rust stains (about 6 inches wide and several feet long) from leakage from a rusty radiator (belonged to one of the sub-contractors who built our home). I have tried several commercial products with no results. The driveway is "exposed aggregate" and the stains really detract from the appearance of my home. Any suggestions?
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