Topica Loopframe_Guzzi Archive


Subject: RE: powder coating jugs

Author: scott grupe

Date: May 28, 2005, 5:03 AM

Post ID: 1718938745



Thanks for all the jeads up tech stuff.

I do know that the HD old school guys are PCing their shovels and pans
with good results in a wrinkle finish.

If I can scrap the $$ up Im going for it. Black wrinkle on the jugs and
a silver anodized color on the heads. Every thing else is polished and
coated so might as well complete the show stopper process.

scotty
Ross wrote:
 
Anodizing could represent a problem for the cylinders. It is done in a
sulfuric acid bath, which would remove the chrome coating. Sand cast
aluminum also has to be treated first in a nitric acid and ammonium
bifluoride strip (there can be a third component, but I forget what) to
remove the silica prior to anodizing. This would also remove the chrome
coating.
Powdercoating can also represent a problem as the coating is quite
thick, 5-7 mils if I remember right. And does not do well in touching
up.
Another possibility would be Gun Kote in gloss black. While the
manufacture recommends anodizing, it isn't absolutely necessary. Without
checking, I believe it requires sand blasting at a low psi. After that,
baking at 325 deg F for an hour or so. It puts a very thin coating, a
seventh or less that of powdercoating. It can be retouched through
sanding and reapplication, but you would have to bake again.
I did it on my cast iron cylinders, and it is quite tough and very
shiny. It is a grey black rather than a blue black.
Finally, the British painted their cast iron cylinders, and aluminum
also, with very little heat transfer problems. The Brit guys have done
extensive oil temperature testing, and there doesn't seem to be a
problem. Guzzis do keep their cool quite well v. the vertical twins.
Regards,
Ross


K. Ross Raymond
Phoenix, AZ, USA
1971 Ambassador LAPD
1975 Norton Interstate (Nearing completion someday)
1969 Triumph T-100 (Project)
1998 Ariel (after the Sq. 4, not the mermaid)


-----Original Message-----
From: AJ Huff [mailto:ajh-@earthlink.net]
Sent: Friday, May 27, 2005 7:09 PM
To: Loopfram-@topica.com
Subject: RE: powder coating jugs


I would consider anodizing. I'm pretty sure it can be done. Wide
selection of colors. More scratch resistant. Advantage of being mostly
permanent. Disadvantage of being mostly permanent. An anodizing shop
should be able to tell you if you can or not.


scott grupe wrote:
 
what are the thoughts about powder coating cylinders black and heads
grey? I realize its not a stock set up but it sure would make for easy

 cleaning .

scott



AJ Huff
'71 Ambassador
Three Rivers, MI
MGNOC# 19917

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