"Auto stains" = oil?
You will never get oil markings off raw concrete. You can clean with a number of solvents (paint thinner, alcohol, etc) and the result will be a cleaned stain.
One of the best ways to clean salt stains off a garage floor is with muriatic acid. Use a light solution or follow the instruction on the bottle.
To clean wood stain off concrete, first, scrape off as much stain as possible using a putty knife or scraper. Next, apply a commercial concrete cleaner or a mixture of water and mild detergent to the stained area and scrub with a brush. Rinse with clean water once the stain is removed.
so you can clean the stains off your clothes
To effectively clean and maintain a stained concrete patio, regularly sweep or hose off debris, use a mild detergent and water for cleaning, avoid harsh chemicals, seal the concrete every few years, and address stains promptly to ensure longevity and aesthetic appeal.
bleach and ammonia
Fresh oil stains from cars can be easily cleaned using dish soap. However if the stains are too difficult to remove using dish soap, you can use water, liquid dish soap, nylon scrub brush and an old towel.
To clean dirt stains off cement, start by sweeping or vacuuming the area to remove loose dirt and debris. Next, scrub the cement surface using a mixture of water and dish soap or a commercial concrete cleaner. For tough stains, you can also try using a pressure washer or a solution of water and white vinegar. Remember to rinse the area thoroughly after cleaning.
To remove WD-40 stains from concrete, first try to absorb as much of the WD-40 as possible using cat litter or sawdust. Then, scrub the area with a mixture of dish soap and warm water. For stubborn stains, you can try using a commercial concrete cleaner or a mixture of baking soda and vinegar.
Ketchup and a sauce pad.
Bit of spit and a rub
To remove gas stains from color-stained concrete, you can try using a degreaser or a mixture of baking soda and water to scrub the stained area. You can also use a pressure washer to help with the removal process. It's important to spot test in an inconspicuous area first to ensure the cleaning method does not affect the color stain on the concrete.
by a chemical called stain out or by using a pumice stone.