Iron fallout remover: Before wash, or after wash?

Got after my car today- I had never used an iron remover before

Iron+Fallout Remover – new item number (05134000) We have changed the name to Iron+Fallout Remover, and changed the packaging to a more economical

Sonax Iron+Fallout Remover 750ml

Product Review: Griot's Garage Iron and Fallout Remover – Ask a

50ml Iron Remover Car Detailing Fallout Rust Remover Spray

How to use Cartec Iron Wash?

Fallout Remover, Iron Remover for Car, Brake Dust

All Wheel Cleaner + Iron Remover, Hybrid Solutions Pro

SONAX Fallout Cleaner - Using Sponge Technique

Adam's Iron Remover & Pressure Sprayer

Pre wash and Snow Foam Guide