Re: cleaning a shower
You can also try a cleaner containing Phosphoric Acid. Usually a pink liquid, you can often find it at plumbing supply stores. May be sold under the name "Bath Brite" by any of several different manufacturers.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.