Acid stains occur when acidic substances such as vinegar, citrus juice, chemical cleaners, or food residues remain on the stainless steel surface for too long. Although stainless steel is highly resistant to corrosion, strong or prolonged acid exposure can dull the finish, leave discoloration, or cause surface marks. Proper cleaning restores the sink’s appearance and prevents further damage.
Begin by thoroughly rinsing the sink with warm water to flush away any remaining acidic substances.
This prevents additional reaction between the acid and the stainless steel surface.
Apply a small amount of mild dish soap to a soft sponge.
Gently scrub the stained area to remove surface residue.
This step often eliminates lighter acid marks and prepares the surface for deeper treatment.
Mix baking soda with a small amount of water until it forms a paste.
Apply the paste directly to the stained area and rub in the direction of the steel grain.
Baking soda helps lift discoloration without scratching or damaging the stainless steel.
Allow the paste to remain on the stain for 5–10 minutes before rinsing.
This gives the baking soda time to neutralize acidic residue.
Lightly spray white vinegar on the baking soda-treated area.
The gentle reaction helps remove deeper discoloration and restores brightness.
Scrub again using a soft cloth or sponge, always following the grain.
After scrubbing, rinse the sink with warm water to remove all cleaning residues.
For tougher acid stains, apply a stainless steel cleaner formulated for metal restoration.
Use a microfiber cloth to rub the cleaner in the direction of the grain.
This step improves uniformity and helps blend minor discolorations.
Apply a small amount of mineral oil or stainless steel polish to a clean cloth.
Buff the sink surface to enhance shine and create a temporary protective layer.
Polishing reduces the appearance of minor marks and improves water resistance.
Deep or old acid stains may require repeating the cleaning and polishing steps multiple times.
Gradual removal prevents damage and preserves the steel’s finish.
Stainless steel has a grain pattern. Cleaning along the grain avoids scratches and improves overall appearance.
Do not use steel wool, sandpaper, or highly abrasive pads. These can cause permanent scratching.
Chlorine can damage stainless steel by weakening the protective chromium layer.
Wiping the sink dry prevents water spots and reduces future staining.
Foods like lemon juice, tomato sauce, soda, and vinegar should not sit on the sink surface.
Strong cleaning chemicals or bleach can create discoloration if left sitting.
A bottom grid elevates pots and utensils, reducing surface contact and preventing stains.
A thin layer of mineral oil or polish adds protection and helps water and residues slide off more easily.
Cleaning acid stains from a stainless steel sink involves gentle but effective steps such as rinsing, using mild soap, applying baking soda paste, and finishing with stainless steel cleaners or polish. With proper techniques and consistent maintenance, acid stains can be removed and the sink’s smooth, bright appearance restored. Preventive habits further protect the surface and maintain long-term durability.
