Zinc planters we back to the Victorian era. Many zinc planters in use today are from that era, while many newly manufactured planters are as beautiful as the ancient originals. If you own a vintage or new, zinc planters spears are expensive. To keep your investment rusting, you’ll want to protect it. Wash the surface of the cast iron pot inside and out with mild soap and water. Dry thoroughly. Use rich in zinc (zinc 90% or more) layer of paint. The paint resistant to corrosion with epoxy resin exterior paint. Let dry and apply a second coat.
Apply a clear sealer formulated for outdoor use if you want to maintain the natural appearance of the casting. Coat each piece of cast iron pot inside and out. Make sure the sealant protects against UV rays. Fill in areas where water can accumulate with epoxy paint or seal after the drill. This prevents the water accumulated in the paint wear or clear sealer, which can cause oxidation. Bring zinc planters in the winter. If they have to be left out, then cover with plastic. You can try to protect zinc planters in your home.