Why throw it away when we di-make it? WD-40
Just look at it job well done, smooth, clean as new just by one or few steps let me take you through!!!
Step 1: Spray the lubricant all over the rusty,stain or unwanted dirtiness.
It can be stainless, aluminium or plastic bring it all back to life. After spraying it all over give it few minutes to cover the whole space then wipe it out with whatever you personally figure as steelwool, dishcloth etc.