How do I get these orange stains off the plastic base to my shower?

No amount of scrubbing or bar keepers friend will remove these stains. Anyone have any ideas?

Help! I got hair dye on my shiplap. Can I save it without repainting?

I’m an idiot- I should’ve taken more precaution and been careful. But this is what it’s done. How can I fix it?

How do I get this off!?

This shower is OLD. We have hard water and I've used everything I can think of to get these stains off but nothing works. Does anyone have any secrets they can share?! The yellow staining (obviously)