This product by all reports does a pretty good job at removing soap scum from shower screens as well as stains on pots and pans.
Product details from Bunnings:
* Premium cleanser and polish that makes household surfaces shine like new again
* Non-bleach formula
* Removes rust, tarnish, hard water stains and lime scale
BAR KEEPERS FRIEND Cleanser & Polish is the multipurpose cleanser for chrome, stainless steel, porcelain, tile, ceramic and fiberglass surfaces among others.
BAR KEEPERS FRIEND is a gentle but effective formula works without chlorine bleach for everyday cleaning and removing tough stains, lime and hard water stains. BAR KEEPERS FRIEND can even remove rust and tarnish from copper and brass.
BKF is the premium household cleanser. With a non-bleach formula, it's recommended for cleaning stainless steel cookware and sinks, glass and ceramic cooktops, solid surface countertops, porcelain and acrylic bathtubs and more. It's the best top-selling cleanser for removing rust, tarnish, hard water stains and lime scale.
Jif