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 Post subject: Carb refinishing
PostPosted: Sat Mar 03, 2007 12:02 pm 
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EFI Slant 6

Joined: Thu Sep 14, 2006 7:54 pm
Posts: 347
Car Model:
Anyone have any luck painting a carb? What paint? What are other options that I could do myself?

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 Post subject:
PostPosted: Sat Mar 03, 2007 12:26 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
I haven't done it, but check Eastwood......

Also they may have a write-up on what's involved.

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64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

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 Post subject:
PostPosted: Sat Mar 03, 2007 2:07 pm 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24512
Location: North America
Car Model:
It is not a good idea to paint a carburetor. Not only will it not protect the metal against corrosion, but most all paints are soluble in fuel, and if any paint happens to get washed into the carburetor by fuel, it'll gum up the works.

Most parts of the carburetors used on our cars are made out of Zinc die-cast ("pot metal", "ZAMAC"). This metal is quite prone to corrosion if it is left unprotected. Leaving pot metal in an aggressive dip-type carburetor cleaning bath or any kind of abrasive treatment (filing, sandblasting, sanding, etc.) strips away the protective coating originally applied by the manufacturer, exposing the base metal to rapid and messy corrosion. When pot metal corrodes, it forms a great deal of powdery white residue that is very effective at plugging up tiny passages and spoiling the operation of the carburetor.

There are several outfits that can reapply the factory-type Zinc Dichromate protective coating to pot metal carburetor castings. Usually this is not expensive. If you're particularly ambitious, I'm pretty sure there are Zinc Dichromate do-it-yourself kits available.

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 Post subject:
PostPosted: Sat Mar 03, 2007 3:01 pm 
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Turbo Slant 6
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Joined: Thu Jun 09, 2005 8:33 pm
Posts: 745
Location: Rolla, MO
Car Model:
If you're going for different colors (or polished w/ clear coat), another option I've seen used is powder coating. There are "at home" powder coating kits that I hear are fairly user friendly, but I have zero experience with them.

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 Post subject:
PostPosted: Mon Mar 05, 2007 1:00 pm 
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TBI Slant 6
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Joined: Fri Nov 18, 2005 8:50 am
Posts: 154
Location: Raleigh, NC
Car Model:
How about something like this?
I'd be a hesitant to paint a carb at any rate.
I think plating using the OEM method would be better. But the chemical hazards involved might make it undesirable.

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 Post subject: carb shop
PostPosted: Mon Mar 05, 2007 1:04 pm 
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EFI Slant 6
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Joined: Wed Nov 02, 2005 12:47 pm
Posts: 445
Location: Runge, TX
Car Model: 1974 W100; 72 Dart
lonestar carburetor here has a spray paint they use...i'll try to find out more.

sb


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 Post subject:
PostPosted: Mon Mar 05, 2007 1:07 pm 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24512
Location: North America
Car Model:
Quote:
How about something like this?
That's just paint.
Quote:
I think plating using the OEM method would be better. But the chemical hazards involved might make it undesirable.
That's why you pay someone else to do it for you! :-)

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 Post subject:
PostPosted: Mon Mar 05, 2007 1:42 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Quote:
Quote:
I think plating using the OEM method would be better. But the chemical hazards involved might make it undesirable.
That's why you pay someone else to do it for you! :-)

That's so they have the mutant children and you don't.........

:twisted:

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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 Post subject:
PostPosted: Mon Mar 05, 2007 1:42 pm 
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EFI Slant 6

Joined: Thu Sep 14, 2006 7:54 pm
Posts: 347
Car Model:
Thanks for all the information, guys. mopar_nocar, let me know if you find out about the carb paint. I can get it done up here for $80 Cdn. Thats powder coating or re dichromated. Hoping for something less expensive. Eastwood has the carb bronze, but I was hoping for a color. Orange to be specific.

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 Post subject:
PostPosted: Mon Mar 05, 2007 5:12 pm 
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Turbo Slant 6

Joined: Tue Feb 14, 2006 4:49 pm
Posts: 566
Car Model:
I have used GunKote on several things from my underwater camera gear to calipers and master cylinders. It comes in colors and you can do it your self with the right tools. The best way I can describe it is a solvent based baked on finish that is like powdercoat. I found it while looking for an alternative to having aluminum parts for my camera rig hard anodized. It is a very thin coating and does not cause fit problems. Doing a carb would still have issues like keeping abrasive grit out while blasting it. It can be done however and it is a very tough finish that fuel and solvents will not touch. You need a small abrasive blast cabinet, a toaster oven and an airbrush. It involves using MEK or acetone. So a proper respirator is needed. Once you have everything it does not cost much to finish your own parts.


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