New master cylinder is rusting
Team Owner
Joined: Sep 2006
Posts: 31,303
Likes: 4,391
From: Westminster Maryland
Hi,
I believe that originally master cylinders had a coat of what was called 'foundry black' on them.
This was to protect them from rusting while they were being machined. Thus the machined areas of the master cylinder were bare.
So a little semi-flat black on them is appropriate.
Regards,
Alan
I believe that originally master cylinders had a coat of what was called 'foundry black' on them.
This was to protect them from rusting while they were being machined. Thus the machined areas of the master cylinder were bare.
So a little semi-flat black on them is appropriate.
Regards,
Alan
Racer
Joined: Jul 2008
Posts: 306
Likes: 8
From: Cypress (Houston) TX
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Burning Brakes
Joined: Apr 2013
Posts: 926
Likes: 2
From: Castle Rock CO
One of the problems with painting the master is the brake fluid so you really need to use a Ceramic Paint that is impervious to Brake Fluid like you would use on your Calipers. I would suggest Duplicolor Brake Caliper paint over anything else that was suggested. It comes in Rattle Can or Brush on. I would use the Brush on it instead of the Rattle Can at this point since you can cover the thing while still in the car. Rattle Can would require you to remove it and clean it up then bleed it again then reinstall it.
You can find this at any Auto Parts Store on the Shelf.
If I were to do this in the car I would put rags under the master then spray the crap out of with Brake Cleaner then I would use a 1/4 inch paint brush to brush on the Ceramic Paint in the Color of my choice. Put at least 3 coats on it following the coating times in the instructions of the paint. Let it dry for at least a week to cure. You will never have a problem if you accidentally spill brake fluid on the master and stripping the paint off.
https://www.duplicolor.com/products/caliperPaint/
You can find this at any Auto Parts Store on the Shelf.
If I were to do this in the car I would put rags under the master then spray the crap out of with Brake Cleaner then I would use a 1/4 inch paint brush to brush on the Ceramic Paint in the Color of my choice. Put at least 3 coats on it following the coating times in the instructions of the paint. Let it dry for at least a week to cure. You will never have a problem if you accidentally spill brake fluid on the master and stripping the paint off.
https://www.duplicolor.com/products/caliperPaint/
Last edited by MakoJoe; Nov 4, 2014 at 08:50 PM.
Team Owner
Joined: Jul 2004
Posts: 40,422
Likes: 792
From: Redondo Beach, California
WD-40 works well. But applying it once, doesn't mean it'll last forever. Where I live, air born dust has salt crystals in it. After WD-40 coating a surface, I come back..a month later or so..and remove the WD-40 and accumulated dust, that's stuck in it, with Windex and respray the WD-40.
Burning Brakes
Joined: Apr 2013
Posts: 926
Likes: 2
From: Castle Rock CO
WD-40® SPECIALIST®
LONG-TERM CORROSION INHIBITOR
http://wd40.com/products/specialist
Again I will tell you the best preventative is Ceramic Brake Caliper Paint because it resists the Brake Fluid and will not fade or rust or be affected by the brake fluid
