How to Stop Rocks From Rusting

Rust occurs when iron is in contact with oxygen over a period of time. The oxidation, or rusting, of iron causes the metal to become red colored and eventually break away. Rust on rocks in your garden or yard can occur because of iron in your water -- or if the rocks contain some form of iron. The rusting is often unsightly and can be difficult to get rid of, once it has stained your rocks. You can prevent rust from staining your rocks before it begins.

Instructions

- 1
  Purchase rocks that do not contain iron, if possible. If you have not purchased rocks for your outside garden or landscaping, make sure to buy rocks without iron. Ask a salesperson at your local garden store for iron-free rocks.
- 2
  Place your rocks undercover in your yard, if at all possible. Water is a big cause of rust, so try to keep your rocks as dry as possible. Wipe them off, if they have been wet for a few days. If you have iron in your water, try to avoid your rocks when watering your garden.
- 3
  Clean your rocks completely, if rust has occurred, by spraying them with a garden hose or soaking them in a tub. Then, use sandpaper or a stiff brush to remove any rust that has already built up.
- 4
  Paint your rocks with an acrylic paint after they have dried completely. Use a clear acrylic paint to protect your rocks. Specifically designed products such as Rust-Oleum, Safe Guard, and Rust Seal are available to help prevent rust. Do not use aqueous-based paints, as they contain water and will contribute to rusting.
- 5
  Coat your rocks with grease or oil. The grease forms a protective barrier around the rocks, like paint, and will prevent rusting. You can buy grease or oil from most auto supply stores or online.

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