Anodizing anodized aluminum

Thomas Giz · 4th June 2011, 03:37 AM

Does anyone know how, where to anodize already anodized aluminum knobs ?
They're black but need them to be gold. I guess stripping off black color comes first. There are anodizing kits online but I don't want to pay an arm and leg for changing the color of small knobs 25mm and 35mm in diameter.
Maybe someone has already such a kit at home ?
Willing to pay for a good service :-)

simon7000 · 4th June 2011, 04:48 AM

It is easy to remove the anodizing, lye will do it. But the black color most likely is a dye used under the finished surface. You are better off starting with natural aluminum. Most folks offer the same knobs in both colors. My anodizer charges $45 minimum. The idea of how to anodize is simple, getting good results is not.

Thomas Giz · 4th June 2011, 05:20 PM

YGPM

Thomas Giz · 4th June 2011, 11:09 PM

This is what I'm looking for. Have the same amp but black knobs which take away good look.

vinylkid58 · 4th June 2011, 11:23 PM

Have you tried contacting them, re; ordering gold knobs?

jeff

Thomas Giz · 4th June 2011, 11:40 PM

Yeah, no answer.
This is an old integrated amp, they ceased production ten years ago. Old but so far I have not been able not find anything better and I went through many.

boywonder · 8th June 2011, 10:40 PM

Check out HiFi DIY Site - VT4C/211 Power Triode

Audio Catalog

They have loads of knobs for a few bucks each in many, many flavors.

Shipping from Asia would be less than the minimum fee at your local anodizer.

Stripping and re-anodizing can be tricky to get a good cosmetic finish.

Thomas Giz · 8th June 2011, 10:48 PM

Just went there and bought what I need. Thanks for the link.

Arty · 11th June 2011, 06:37 AM

sidenote, one can achieve black aluminium via anodizeing.
suposedly if i remember correctly a strong acid will do the trick.
//before experimenting wait till someone verifys my memories and recommends an acid//

4th June 2011, 03:37 AM	#1
Thomas Giz diyAudio Member Join Date: Feb 2003 Location: CA	Anodizing anodized aluminum Does anyone know how, where to anodize already anodized aluminum knobs ? They're black but need them to be gold. I guess stripping off black color comes first. There are anodizing kits online but I don't want to pay an arm and leg for changing the color of small knobs 25mm and 35mm in diameter. Maybe someone has already such a kit at home ? Willing to pay for a good service :-)

8th June 2011, 10:40 PM	#7
boywonder diyAudio Member Join Date: Jan 2008 Location: So.Cal.	VT4C audio website has tons of knobs... Check out HiFi DIY Site - VT4C/211 Power Triode Audio Catalog They have loads of knobs for a few bucks each in many, many flavors. Shipping from Asia would be less than the minimum fee at your local anodizer. Stripping and re-anodizing can be tricky to get a good cosmetic finish.

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4th June 2011, 04:48 AM	#2
simon7000 diyAudio Member Join Date: Nov 2008 Location: Oakmont PA	It is easy to remove the anodizing, lye will do it. But the black color most likely is a dye used under the finished surface. You are better off starting with natural aluminum. Most folks offer the same knobs in both colors. My anodizer charges $45 minimum. The idea of how to anodize is simple, getting good results is not.

4th June 2011, 05:20 PM	#3
Thomas Giz diyAudio Member Join Date: Feb 2003 Location: CA	YGPM

4th June 2011, 11:23 PM	#5
vinylkid58 diyAudio Member Join Date: May 2005 Location: Victoria, B.C.	Have you tried contacting them, re; ordering gold knobs? jeff

4th June 2011, 11:40 PM	#6
Thomas Giz diyAudio Member Join Date: Feb 2003 Location: CA	Yeah, no answer. This is an old integrated amp, they ceased production ten years ago. Old but so far I have not been able not find anything better and I went through many.

8th June 2011, 10:48 PM	#8
Thomas Giz diyAudio Member Join Date: Feb 2003 Location: CA	Just went there and bought what I need. Thanks for the link.

11th June 2011, 06:37 AM	#9
Arty diyAudio Member Join Date: Feb 2011	sidenote, one can achieve black aluminium via anodizeing. suposedly if i remember correctly a strong acid will do the trick. //before experimenting wait till someone verifys my memories and recommends an acid//

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