Interesting though that some discs rust more quickly than others. The Xtrail discs were covered in rust on the braking surface after overnight dew in summer. Left for a week in the rain the initial braking was interesting. The P38 on the other hand shows little rust on the braking surfaces in the same conditions.![]()
There are several different make ups of Grey Iron Keith. Also it depends on what was in the rain. It's not as pure as we may think.