I am rebuilding a set of completely frozen and rusty Girling brake calipers (1972 vintage). The rear calipers have the pivoting mechanism on them for the e-brake, seen below with the twin metal ears that were also frozen causing the brake cables to snap.
I decided to try the WD40 Rust Remover after reading the positive reviews on Amazon and figured for $30 for the large container...let's give it a shot.
After 2 days of soaking it, I was VERY impressed, not only did it get rid of the rust but it freed up the e-brake mechanism whereby it pivots properly. I actually couldn't believe it. the stuff is also non-toxic and non-corrosive.
Highly recommended!
Here are some pictures.
My best,
Yasin