What should I do about rusting in sump?

[Bruttall]

The Original WD-40, did have Fish Oil in it. I remember the smell when I was a kid, but it’s not been used in years. Also the Rust Oleum Primer, and some of their other paints had Fish Oil in them. You could smell it when opening a new can, and could see it in the paint surface. BTW, Bathroom Paint, had a Slight Trace of Mercury in it. That’s why mold wouldn’t grow on it.

55 years old, been using wd40 for 50 years, guess I never paid attention to them changing the formula. it still works.