cleaning a toilet help needed!

Muratic acid is available at farm stores , pool stores , Home depot , Lowes , etc…. But you will be 1/3 the way to a new basin .
Go buy a 6 pack of Coca Cola , a fifth of Bacardi and a new toilet.
Yes,
That and Muriatic Acid is nasty stuff. I used to use it in my pool. Now there are less nasty options available.