Restore cruise servo finish

[bc69]

Anybody have a suggestion on how to restore finish. Told it can not be dipped without destroying diagram.

[169INDY]

I have used my plater to renew the A.I.R. check valves without any detriment or damage to the rubber check valve internal flap. My plater process is COLD so heat is not an issue. Not without risk but I had personally work fine. The Cruise looks complicated with the two inlet tubes, diameter crimp, chain pull & wheel pulley. I am not sure if it can be done and retain functionality. Would be interesting to fin other donors and experiment with them first before committing to your in sue component.

Jim

[bc69]

Just servo would have to be done. Bracket left as is. Donor??? Maybe later model but fought you'll find another one of these.  Maybe a later model to exp with?.

[firstgenaddict]

I think you would be amazed at how nice that would look if you plugged the two vacuum ports and submerged it in Evaporust or Safest Rust remover for a few hours.

[bc69]

James there is also a series of vent holes around servo along with the center hole
Where chain is attached to diaphragm. And to make matters worse or more difficult if you will, is the presence of a ink date stamp on the bottom that I would like to preserve.

[firstgenaddict]

Evaporust will not hurt intact rubber(as long as it is not cracked and brittle now it should be ok.) if you are concerned with the vent holes find some wooden dowels and plug the holes.
The ink stamp, I personally would position the diaphram with the ink stamp out of the solution or use a piece of tape to cover it.

Here is a window track which had similar corrosion, the line where this was submerged in warm(80deg) evaporust for 2 hours is clearly viisible.

[bc69]

Most of what you see here is silver paint. Will it also take off paint at about same rate as the rust? This looks good James!

[69Z28-RS]

Evaporust (and Metal Rescue and other similar products) do not harm paint, glass, rubber, etc.  It only attacks the rust (iron oxide)...

[bc69]

Will address paint  first and then look into rust remover. Might have to try brushing on and keeping wet that way instead of dipping.
Then after cleanup question is how to get cad look back?

[69Z28-RS]

Will address paint  first and then look into rust remover. Might have to try brushing on and keeping wet that way instead of dipping.
Then after cleanup question is how to get cad look back?

if you want to keep a part 'wet' with evapo-rust, without soaking it, you might try using a paper towel, wetting it with evaporust, and laying on the rusty areas.. spray that with evaporust to make it *very wet*, and then putting the part wet paper towel and all ..  into a plastic baggie and sealing it up - that will help minimize evaporation.  Evaporust works best if you can keep it warm... so keep the bagged up part in a warm area.  To get back the 'cad' look, it would be best to have it cad plated, although if you can't/won't do that, then there are 'paints' available to simulate the cad look.

[firstgenaddict]

It won't remove paint or plating which is properly adhered to metal devoid of corrosion.
If you have tiny rust blooms and rusty hair lines it will remove the paint in the areas raised by the rust, if you can take a credit card edge and drag the corner by scraping the hair line you may see the extent it will remove the paint.
Rusty hair lines in the paint will double or triple in size and a pin point will become a 1/16-1/8" dot.

The paper towel trick works exceeding well.

[bc69]

Turned out ok this way.

[bc69]

Servo refinished