Painting the master cylinder

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bthieson

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Howdy,

I'm on my third master cylinder since I purchased my car 3 years ago, and I've noticed that they really like to rust. My car doesn't really rust anywhere else, so I'm going to guess it has something to do with the brake fluid condensation or something. If I was to paint the master cylinder, what steps would i need to take to do so, and what kind of paint?
 
Get a pint of this stuff: http://www.hirschauto.com/acb/showdetl.cfm?&DID=27&Product_ID=10&CATID=1

It's super tough and chemical resistant including brake fluid. I've even submerged parts coated with this in phosphoric acid and it won't take it off. Use a cheap *** foam brush to apply it. It is availible in silver or black. UV rays will break it down, but since this is under the hood, I don't see any reason to top coat it.

As far as prep is concerned, you just have to make sure the master cylinder is completely dry (no brake fluid) and the ports plugged. Brush off the loose rust and coat. Believe it or not, this stuff wicks right into the rust and sticks best to a rusted surface.

Hope this helps.
 
synthetic brake fluid will help also
 
In my experience, nothing that would be resistant to brake fluid. Maybe someone else has a another idea.
 
I used a paint called Cast Blast. I got it a swap meet years
ago. I cleaned my master with regular brake clean. Then sprayed
that paint on. It's been on the car for about 4 years. Still
looks the same as when I painted it. Try Eastwood. They have
something like it. Good luck.
 
I used Rustoleum Valspar on mine. I painted it after install and bleeding. Use A small short bristle brush, and paint around everything real slow, and carefull.
I used a semi flat black.

Dave C.
 
i worked at a hot rod shop for a while.every part of the suspension(spindles,caliper brackets,etc)including the rotors and calipers had to be painted what ever the frame was painted.i wiped the parts with laquer thinner,etch primed,urethaned primed,then base cleared all the parts after the machined surfaces and rubber bushings,etc. were taped up.Some of the cars were driven alot,and the paint stayed just as shiny as the rest of the car with just normal car was soap.never bistered,bubbled or anything.BUT!dot 5 brake fluid is the ONLY brake fluis that will not harm paint.evreything else,dot3,4,will eat the paint off,if it is allowed to remain saturated for a long time,but the base clear and single stage urethane is way more resillient than anything in a spraycan
 
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