Removing paint from metal using only a paint scraper is a tedious task. A paint removing solvent will make the job go so much quicker. Whether you are restoring painted brass hardware on a beautiful vintage door or removing paint splatters from window frames, look no further than good old vinegar! Just because you keep it in the pantry, it does not mean vinegar’s applications are limited to the kitchen.
Vinegar is an excellent solution if you want to remove paint from metal objects. First, heat half a cup of vinegar in the microwave or in a saucepan. Next, use a clean sponge or paintbrush to apply the heated vinegar to the painted object. Let the paint soften for 10-15 minutes, then scrape it off with a paint scraper.
Vinegar is a cost-effective, natural alternative to commercially available paint strippers, that contain toxic chemicals and give off harsh fumes. It is a gentle solvent that will not damage the metal or any material surrounding it. Let us look at what exactly in vinegar gives it the ability to strip paint from metal.
How Does Vinegar Work to Remove Paint?
Vinegar contains mostly water and a mild acid, called acetic acid. Usually, the distilled white vinegar that we buy from the grocery store contains about 4-5% acetic acid. The acidic property of vinegar makes it a solvent.
On a chemical level, acetic acid in vinegar breaks down into two parts: acetate and hydrogen. The hydrogen atoms are missing an electron, so will bond to whatever molecules they encounter (like paint or rust), weakening their molecular structure.
The acetate, on the other hand, has an extra electron that makes it strongly attractive to other atoms, especially metals. The acetate bonds to these atoms to create new molecules that can be dissolved by water. This is how these two components of acetic acid work together to weaken the paint.
Heating the vinegar concentrates the acetic acid, making it stronger and more corrosive, therefore more effectively able to break down the paint particles.
Advantages of Using Vinegar to Remove Paint From Metal
There are several reasons to reach for your trusty jug of distilled white vinegar, instead of buying paint stripper:
- It is much cheaper than commercial paint strippers.
- You probably already have some at home – no need to run to the hardware store.
- It contains none of the harsh chemicals or dangerous fumes that are in paint strippers – meaning that its healthier for us and we do not need to wear a respirator.
- It is safer and easier to use than paint stripper – no worries if you get it on your skin!
- Vinegar is better for the environment because it is toxin-free.
How to Strip Paint From Metal Using Vinegar
Vinegar can be used to remove paint from a range of metals, like galvanized steel, stainless steel, aluminum, brass, bronze, and copper.
Before you begin, make sure you have the following tools at the ready:
- A saucepan and stove or a microwave and a heat-resistant bowl
- Distilled white vinegar
- A paint scraper or putty knife
- A sponge or paint brush
Follow these steps to clean dried paint off metal objects:
- Place a small amount of distilled white vinegar (half a cup should be enough) into a saucepan and heat it on the stove until it is hot, but not boiling. You could also heat the vinegar in the microwave. Heat up a larger quantity if you are cleaning a big surface.
- Use a clean sponge or paintbrush, dip it in the hot vinegar and dab it onto the paint you want to remove. Gently scrub the painted area.
- Let the vinegar work its magic for 10-15 minutes. Depending on the thickness and type of paint, you may need to reapply the vinegar a few times.
- You will notice the paint loosening from the surface of the metal.
- Use a paint scraper to remove the paint, taking care not to scratch the metal underneath.
- Use a damp cloth to wipe down the cleaned metal to remove any remaining traces of paint and vinegar. It is important to clean all the vinegar off the metal because it will keep corroding it.
This method can also be used to safely remove dried paint from glass windows, mirrors, plastic, or wood!
More Natural Ways to Remove Paint From Metal
On the off chance that you have run out of vinegar, there is another pantry staple you can use. Sodium bicarbonate, or baking soda, is another natural ingredient that one can use to loosen paint from metal. This method works especially well for small metal objects, like hinges, that can fit into a pot.
For the baking soda method, you will need:
- A pot that the metal objects can fit into (use an old one that you do not cook in anymore).
- A quarter cup of sodium bicarbonate (baking soda not baking powder).
- Metal tongs.
- Paint scraper.
- Old toothbrush or soft scrubbing brush.
- Newspaper or paper towels.
Follow these easy steps:
- Fill the pot with enough water to submerge the objects and add the sodium bicarbonate.
- Bring the water and baking powder solution to a boil on the stove before using a pair of tongs to place the painted metal items in the pot. Make sure that the items do not touch each other, the sides of the pot, or overlap.
- Reduce the heat on the stove, letting the items simmer for 15-20 minutes.
- You will already notice the paint flaking off. Using the tongs, remove the metal objects from the pot and place them on newspaper or a paper towel to cool.
- Using your old toothbrush, or any soft-bristled brush, scrub off the paint. You may need to use a paint scraper tool for flat metal surfaces. If there are many layers of paint, you may need to repeat the boiling process.
- Once the items are paint-free, allow them to dry and wipe them using a clean cloth dipped in mineral oil.
Vinegar is an effective, natural solvent that can be used to remove dried paint from a variety of metals – galvanized steel, stainless steel, aluminum, brass, bronze, or copper. The acetic acid in vinegar is what gives it the ability to loosen paint from metal. The mild acid breaks down the bonds between the paint molecules, and between the paint and metal.
To use vinegar to remove paint from metal, first heat the vinegar on the stove or in the microwave. This step is important to concentrate the acetic acid, strengthening its corrosive power. Dab the hot vinegar onto the paint with a sponge or paintbrush and allow it to sit for 15 minutes. When the paint starts to loosen, gently scrape it off using a paint scraper, taking care not to scratch the underlying metal. Wipe off all the vinegar when the paint is removed, to prevent it from corroding the metal further.
There is no need to run to the hardware store for expensive paint strippers that contain dangerous chemicals and give off toxic fumes. There is a convenient, safe alternative in your own kitchen pantry! If you have run out of vinegar, try using the baking power method to remove paint from metal.
You may also like: Will Painting Over Rust Stop It?