I recently purchased CRC Evapo-Rust as a soultion to my rusty metal problems. Needless to say this stuff works! Ive also been battling a mil-scale removal conundrum… flap discs/time/impatience/mess… i tried the Evapo-Rust on a clean piece of 14g HR steel and washed away my mil-scale with water. So happy!
Now to build dunk tanks/wash stations 
Hope this helps you guys!!
Shoutout to CRC… i would take a sponsorship deal 