This Rust-Oleum Stops Rust automotive enamel spray paint is 47% off at Amazon. It's the best deal we could find by $4.
It comes in a 12-oz. aerosol can in gloss black. Shipping is free for Prime members.
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Features 12-oz. aerosol can Gloss black enamel finish Made for automotive use Dry time of 1 hour Made in the United States