My bathtub is in the same situation, the porcelain is worn off. I have looked into refinishing it, but I am not satisfied with what I have found. But I have found a way to keep it looking good and clean....after a million products. I get it looking as good as new with Bar Keepers Friend cleanser. I don't know what is different about this one, and I have tried so many cleansers, but this does the job---it is like it bleaches out the tub.

I know this isn't what you are looking for, but it is all I have to offer. I will be watching this for other suggestions that I might consider for the tub.

But I do appreciate your answer.

I thought by tub needed to be resurfaced until folks on DU told me about this product. Cleaning took a while the first time with lime build up but since that initial scrub, the tub looks like new.

Works like a dream on Stainless too.

(No, I don't own stock in the company and don't even know what company it is.)

It also works wonders on old Corningware. My old white Corningware was yellowing and had spots that were burned looking. Nothing worked. This is how I found out about it---my b-i-l was here and he would offer to do the dishes so my sister and I could chat. Well, he is the one who swore by it, and went and bought some so he could clean my Corningware and I was shocked. It looked like new!

Like a shower stall? Mine is starting to look pretty tacky, but I don't want to strip the gloss off it.

what they suggest it be used on-----and it says "DO NOT USE BAR KEEPERS FRIEND ON:
Gold, silver, pewter, marble, lacquered metals, or anodized aluminum"

It does say that it can be used on fiberglass and acrylic without scratching. I wasn't sure about that.

Interestingly, there is a powder cleanser, which is all I have ever used (or seen), and a liquid soft cleanser. I do not know if you have to use the soft cleanser on your shower or not, but I read the label on the powder and it says it can be used.

This is all the suggested uses: http://www.barkeepersfriend.com/using-bar-keepers-friend

Good luck with the shower stall.

4 for $12, free shipping, from Amazon.

I have seen it in hardware stores, grocery stores, etc......but it is usually at the very bottom or top shelf. You have to look for it, they don't have the visibility of the major brands.

I probably don't need it.

I Googled it and got this response.
There are others, so you may wish to Google it for them.

How to Refinish a Toilet Bowl

Bar Keeper's Friend was great for my old cast iron bath tub!!!! Ty Ty Ty!