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> Refinishing: Magnesium Fan Shroud & Transmission Case, Need Advice
mepstein
post Oct 20 2017, 01:21 PM
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Playing with cerakote at the shop.


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mgphoto
post Oct 20 2017, 02:07 PM
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QUOTE(mepstein @ Oct 20 2017, 12:21 PM) *

Playing with cerakote at the shop.



Talk about bling!
Big heavy chain and you can go clubbing!!
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Mueller
post Oct 20 2017, 02:14 PM
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QUOTE(mepstein @ Oct 20 2017, 12:21 PM) *

Playing with cerakote at the shop.



Dang, that looks good!

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burton73
post Oct 20 2017, 02:22 PM
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https://www.cerakotehightemp.com/testing/

Testing of Cerakote High Temp

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914_7T3
post Oct 20 2017, 07:43 PM
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Thanks for chiming in everyone and the photos look great. Will be going ceramic titanium on the Muffler.

Spoke to a high end 911 restorer earlier today and confirmed that brass wool is the way to go on the transmission case. Also learned that media blasting may be too harsh for the fan shroud so I now have a line on someone that can do tumble blasting that is more gentle.

Here's the kicker, the recommendation is not to coat the magnesium with any paint or clear finish, but to liberally spray it with WD-40 for a natural finish and leave it alone.

As good as all of the painted photos look, I will go with the unfinished look.
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mepstein
post Oct 20 2017, 08:04 PM
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Gibbs works better than WD-40 for longevity.
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914_7T3
post Oct 20 2017, 09:49 PM
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Here are some photos of the case from the 76 911 SC that sold at Gooding in Scottsdale this January for $93K

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914_teener
post Oct 20 2017, 09:51 PM
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QUOTE(914 7T3 @ Oct 20 2017, 06:43 PM) *

Thanks for chiming in everyone and the photos look great. Will be going ceramic titanium on the Muffler.

Spoke to a high end 911 restorer earlier today and confirmed that brass wool is the way to go on the transmission case. Also learned that media blasting may be too harsh for the fan shroud so I now have a line on someone that can do tumble blasting that is more gentle.

Here's the kicker, the recommendation is not to coat the magnesium with any paint or clear finish, but to liberally spray it with WD-40 for a natural finish and leave it alone.

As good as all of the painted photos look, I will go with the unfinished look.



I saw no harm and couldn't think of any on powder coating the fan shroud. I brass wheeled the trans case and used Gibbs as described keep the mag from corroding. The trans gets hot so I didn't want any insulation to inhibit radiation of heat away from it.

It's probably not much but with air cooled motors every little bit helps.
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worn
post Oct 21 2017, 04:09 AM
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QUOTE(eric914 @ Oct 20 2017, 09:07 AM) *

I did a little digging on what the aircraft and marine industry uses and ended doing the final wash on the raw case with Prekote surface pretreatment then priming with Zinc Chromate primer. Not sure what ill do for a top coat yet.

That is what I chose. From aircraft spruce.
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toolguy
post Oct 21 2017, 09:27 AM
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You should look into Boshield T-9 from Boeing as
a preservative for bare Magnesium. Just saying. . .
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rgalla9146
post Oct 21 2017, 11:52 AM
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Nothing screams 'beware' louder than a brightly painted VW or Porsche engine or trans.
Applying a legitimate preservative ? that's another story.
I do like the Cerakote on Bens valve covers. Perfect for magnesium wheels.
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mepstein
post Oct 21 2017, 01:06 PM
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QUOTE(rgalla9146 @ Oct 21 2017, 01:52 PM) *

Nothing screams 'beware' louder than a brightly painted VW or Porsche engine or trans.
Applying a legitimate preservative ? that's another story.
I do like the Cerakote on Bens valve covers. Perfect for magnesium wheels.

Rory secretly covets our chrome trans. (IMG:style_emoticons/default/laugh.gif)
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raynekat
post Oct 21 2017, 09:24 PM
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Ben, your valve covers look super.
What did you paint them with?

QUOTE(mb911 @ Oct 19 2017, 05:09 PM) *

Here are my valve covers sprayed as well..

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rgalla9146
post Oct 22 2017, 06:13 AM
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QUOTE(mepstein @ Oct 21 2017, 03:06 PM) *

QUOTE(rgalla9146 @ Oct 21 2017, 01:52 PM) *

Nothing screams 'beware' louder than a brightly painted VW or Porsche engine or trans.
Applying a legitimate preservative ? that's another story.
I do like the Cerakote on Bens valve covers. Perfect for magnesium wheels.

Rory secretly covets our chrome trans. (IMG:style_emoticons/default/laugh.gif)


Ok, Ok, Mark I'll admit it. It looks good.
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IronHillRestorations
post Oct 22 2017, 02:38 PM
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Media blast with walnut shells, clean with solvent, paint with high temp clear or unobtrusive gray/silver/cast metal high temp paint.

Bright silver looks great! .....on a VW sand rail or Meyers Manx.



(IMG:style_emoticons/default/rocking nana.gif) (IMG:style_emoticons/default/rocking nana.gif) (IMG:style_emoticons/default/rocking nana.gif)
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Rav914
post Oct 22 2017, 04:35 PM
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QUOTE(914 7T3 @ Oct 20 2017, 08:49 PM) *

Here are some photos of the case from the 76 911 SC that sold at Gooding in Scottsdale this January for $93K



Wait? What? $93K?

For a '76S?
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Guberif
post Oct 23 2017, 12:44 PM
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New to this and can't figure out how to upload compressed pics. Still too big i guess. If you want you can just pm me and I'll email you my pics.

I got mine shining like a diamond! with no paint, but yet still protected.

Anyway, I just did both the fan shrouds, trany, h.e.'s & some select heater ducting last summer with good old fashioned elbow grease, dremmel with buffing pads, die grinder with several soft scotch brite pad, mothers polish seemed to work the best out of the 6 different types of polish I had tried, mothers polishing cone to get in on all the nooks and crannies and toothbrushes and a flexible narrow putty knife! I protected mine with diamond clear from eastwood, (father was a chemist) this stuff is relatively high temp and especially formulated for bare metal.



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