Yes it is completely safe.
Is bar keepers friend safe on marble.
To get rid of stuck on food or discoloration and stains from using too high of a heat we recommend cleaning your all clad with a product called bar keeper s friend.
I just did a bar cabinet top that had fifty years of rust colored stains and left it to dry for 48 hours.
I had to try it out.
It will make scuffs and scratches disappear.
The active ingredient in bar keeper s friend is oxalic acid.
Heather notes bkf bar keepers friend and bkf is not recommended for marble signed stained in stuttgart.
Bar keepers friend cleaner and polish.
If you own or collect any of those brightly colored vintage pyrex dishes you can use bar keepers friend to clean them up.
Bar keepers friend granite stone cleaner polish is specially formulated for use on smooth polished stone including granite marble and quartz.
Use bar keepers friend and a soft sponge to clean your stainless steel appliances.
It is in a cardboard can like the old ajax or comet cleaners if not at your grocery try hardware store.
Make sure to use a soft sponge to avoid scratching the finish.
It is even recommended by the manufacturer.
At this point i decided the marble was already shot so i couldn t do much worse.
Marble is a soft stone and acids like bkf actually dissolve the stone.
Wipe clean using a soft clean dry cloth or paper towel wiping in a circular motion.
But again my marble is honed and i wouldn t recommend it on polished.
The bottle told me it was ok to use on marble even though googling it told me it wasn t.
That stuff removed some hard water stains on the tub that i thought would be there forever.
In short bar keepers friend is now my best friend.
Spray directly onto granite or stone surface.
If so i m not sure what products are safe for marble but also disinfect.
I researched it a little and found that its active ingredient is oxalic acid which is naturally derived and found in lots of green leafy things.
In the past we ve boiled the crystals in rhubarb greens which contain oxalic acid but bar keeper s friend looks like it might be easier.
Oxalic acid is very handy for cleaning iron staining off quartz crystals and being a weaker acid than hcl it is less likely to damage the crystals.
Great result with 95 of stains out.
Just add water to make a soupy paste.
As i noted in the question above bar keepers friend is not recommended for use on marble or cultured marble.
Use bar keepers friend granite stone cleaner polish on stone granite and marble countertops vanities polished stone fireplace surrounds and sealed stone lawn ornaments.
Sorry to not be of more help.
When i need to clean something off the surface either in the kitchen or the master bath i use the bar keepers friend.
A few weeks ago commenters on the best way to clean your bathtub were giving rave reviews about a product i d never heard of bar keepers friend.