Treat stubborn stains with oven cleaner.
Clean old stained porcelain tub.
Dishwashing liquid works well as a regular cleaner for a porcelain bathtub as does a diy scum fighting remover of vinegar dish soap and cornstarch.
Use a rag or soft sponge to scrub the porcelain and then rinse well with water.
Let the cleaner sit for two to three hours to give it time to draw out the stains.
Using this give the inside of the tub a really good wipe down.
Combine hot water with dishwashing soap.
A dull or streaked tub might shine up to presentable status with a little elbow grease.
You can also use cleaning screens like lightweight sandpaper for your tub.
Cleaning a porcelain enamel tub 1.
Get yourself a nice large bucket 5 gallons and mix in it 2 gallons of water and cups of white vinegar.
Get an old towel shirt or rag and dampen it.
For gentle weekly cleaning look for store bought cleansers that are marked safe for porcelain enamel or make your own by mixing a few tablespoons of dishwashing soap with about a gallon of hot water.
One example is shawspads.
The reader s digest version website suggests spraying the stained sections of your porcelain tub with a commercial oven cleaner.
Treat stains with hydrogen peroxide or baking soda and ammonia.
Use a sponge and soak it in the white.
Wipe down your tub.
Pour warm water into a bucket and mix cup of baking soda and cup of ammonia while baking soda is slightly abrasive.
Materials required baking soda dry abrasive cleaner hydrogen peroxide white vinegar.
Kerr suggests using a pumice scouring stick to scrub away stains noting that they also work well on stained porcelain toilets.
Rinse your bathtub thoroughly and dry with a soft cloth.
Soak a non abrasive sponge in the baking soda ammonia solution and scrub the surface of your porcelain bathtub or sink.
If your tub has a tough stain you can break out some cleaning screens which are similar to lightweight sandpaper.
Sponge wipe the tub with a solution of warm water and one fourth cup each of baking soda and ammonia.
Dip the sponge in the solution scrub and repeat.