25.4 oz. More Spray and Foam

YES!! Excellent removes soap scum stains and make porcelain look brand new, as it does stainless steel!

You can use it on any surface listed on the bottle.

Yes it will remove it

Yes.

Yes. Just follow directions on the label. I also found that CLR Is a product you might find useful in this application. It is located in the same department you found BarKeepers friend. Calcium, Lime & Rust Removers - Home Depot

Yes. See my recent post on this subject.

Yes. The manufacturers' web site is recommending this product for your application.

Yes, but the cleaner you most likely need is CLR it is sold in the same department as the barkeepers' friend.

Not positive, but if anything will "IT" will.

This product is not a good solution for your question. This product, in my opinion, is a better solution to your question. It is located in the same department. "Cleaners" Here is what the manufacturer has to say about this product. Concrobium Mold Stain Eraser is a powerful cleaning solution that targets tough embedded mold and mildew stains on hard and fabric surfaces. The product contains no bleach and won’t discolor or damage surfaces. No scrubbing or rinsing is required. Use it indoors or outdoors on tile, grout, drywall, decks, patios, fences, walkways, concrete, siding, railings, gutter, roof and outdoor furniture. One bottle cleans up to 300 sq. ft. Removes tough mold and mildew stains No scrubbing or rinsing required Contains no bleach and won’t discolor surfaces For outdoor and indoor use Can be used after Concrobium Mold Control to treat remaining stubborn mold stains Works on wood, composite wood, concrete, masonry, drywall, grout, stone, fiberglass, tile, plastic, laminate, aluminum and metal Cleans 250- 300 sq. ft. Subject to or will include a recycling fee in the following states: CA, OR