As we mentioned a little while ago, we caught up with Almost-Doctor Dan during a recent whirlwind trip to New York. He generously shared another practical, easy-to-follow tip for maintaining tools and small metal items at home.
When we asked for simple home tips, Dan immediately recommended using an everyday household beverage to clean rusty tools: Coca-Cola. The idea sounds almost too good to be true, but the method is straightforward and effective for light to moderate rust. Here’s his step-by-step recommendation and the reasoning behind it.
To clean old rusty tools with Coke, fully submerge the tools in a tub or bowl of Coca-Cola and leave them overnight. If rust remains, extend the soak for several days. After soaking, rinse the tools thoroughly with water, dry them completely, and apply a light coat of oil or lubricant to prevent future rust. Coke contains phosphoric acid, which targets iron oxide (rust) and helps dissolve it; it is more effective on the oxide than on the underlying metal over short periods. Long exposures could eventually corrode steel, so limit soak times to the minimum needed to remove the rust. For people worried about acids in food and drink, note that common dietary acids like vinegar and citrus are more concentrated than Coke in the stomach; occasional exposure to dilute acids from beverages is not the same as direct chemical exposure on metal. Coke is not the healthiest drink for regular consumption for dietary reasons, so repurposing a can for cleaning is a practical use.
This approach is an easy, inexpensive option for restoring the appearance of hand tools, small garden implements, metal candlesticks, vases, hinges and other decorative metal pieces. For many readers, the convenience and low cost of a single can make it a go-to for seasonal tool maintenance. Below are a few practical tips to get the best results and protect your items afterward:
- Choose a container that fully covers the rusted area and allows items to rest without being crushed.
- Remove heavy dirt or grease before soaking – a quick scrub with a wire brush speeds the process.
- Soak overnight for light rust; for more stubborn spots, check daily and extend soaking to a few days rather than weeks.
- After soaking, use a nylon or brass brush to gently remove loosened rust, then rinse and dry immediately to avoid re-oxidation.
- Finish with a thin coat of machine oil, light motor oil, or a rust-inhibiting spray to protect the metal surface.
There are alternative household acids that can help with rust, such as white vinegar or lemon juice; they can be effective for smaller items and are commonly available. Vinegar, for example, contains acetic acid, which will also break down rust over time, while lemon juice offers citric acid. Each solution has pros and cons in terms of speed, smell and potential effects on finishes, so test on an inconspicuous area first.
Almost-Doctor Dan’s tip is a useful reminder that many everyday products can serve multiple purposes around the home. Repurposing items for cleaning and maintenance can save money and reduce waste, provided you follow basic safety and handling steps. Have you tried Coke, vinegar, or another simple household item to remove rust or clean metal? Share your experiences and any other clever, safe cleaning hacks you use around the house.
What makes Almost-Doctor Dan the smartest guy we know? Learn more about our resident braniac (and my little brother) right here.