I have salvaged some Metro 4 Pot Brake Callipers and Rotors from a Metro that I am salvaging parts from. As they have been sat on the car out in the weather for many years, they need some TLC.
What would be the best way to clean them up?
I was planning on stripping the callipers down and removing the pistons and then dropping them in a bucket of diluted Citric Acid Crystals, a method I have used successfully for de-rusting parts before.
Then dependent upon the condition of the pistons, buying the odd new piston and new seals all around.
I wasn't going to paint them just oil them up to prevent them rusting as I thought I'f leave the colour choice to the buyer, I guess I could prime them, if so what heat resistant paint should I use?
For the rotors I was again going to de-rust them using the citric acid.
Does all of the above sound OK or will it damage the brakes rendering them un-useable?
Strip them down fully and the citric acid will do the trick. I have always painted my calipers with normal (not HT), good quality zinc primer and aerosol topcoat. I've never had any problems with the paint coming off or blistering due to heat, maybe I'm not braking hard enough! Just make sure the prep is perfect with no grease left. I love doing calipers, it's always really satisfying when they're finished and shiny.