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Old 7th October 2007, 08:32 PM   #1
Duo is offline Duo  Canada
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Default To paint brushed aluminum

I'm finally around to finishing what has been a prototype amplifier for the last three years.

Part of my job is to get the faceplate painted a nice matte black or even slightly glossy.

It's made of brushed aluminum.

I would like other's suggestions and experiences with doing such a paint job. It's important to me that it coats evenly, looks even, and is very durable.

I tried an initial attempt with black rust paint to see what I'd get and this obviously doesn't work. It crackles off and doesn't coat evenly. It's terrible.

I must find a good primer and quality paint to use.

Any help, as always, is greatly appreciated.
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Old 7th October 2007, 09:39 PM   #2
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Go to the auto paint and finishing store and get a bottle of the special etch they use for this purpose. Without the proper metal treatment, it's near impossible to get good adhesion and durability.
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Old 7th October 2007, 09:45 PM   #3
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Thank you.

So this must make the aluminum absolutely clean and ready for painting?
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Old 8th October 2007, 01:53 AM   #4
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I think it also give the surface a slight tooth, so the paint will adhere. I had some alloy headlight covers on a Triumph that the factory paint refused to adhere to, but after treating with the right flavor of stuff, the paint is still going strong after 20 years.
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Old 8th October 2007, 02:05 AM   #5
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Duo,

(1st -- are you in Victoria yet?)

You can get this thing powder coated for about the price of a 1st class spray bomb...

Chris knows where.

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Old 8th October 2007, 02:29 AM   #6
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Yes, yes, powder coat is a wonderful thing!
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Old 8th October 2007, 04:10 AM   #7
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Ohhhh really?

Dave: Is this some place in victoria you're speaking of?

I'll certainly wait if there's a nice place there to get it done professionally.
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Old 8th October 2007, 04:48 AM   #8
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Quote:
Originally posted by Duo
Dave: Is this some place in victoria you're speaking of?
Yes.
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Old 8th October 2007, 04:50 AM   #9
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Cool.

I'll leave a preliminary plate on there for now and when I get to Victoria, I'll make a new one and have it painted nicely.
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Old 8th October 2007, 11:42 AM   #10
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Duo

If your amplifier is aluminium you could also think about anodising.

I have diy anodised my last amplifiers and they look great. I choose diy anodising as I did not want to paint the heat sinks. There are two threads on diy anodising on diyaudio also some sites on Google. If you are interested and can not locate the diyaudio threads please e mail me.

Don
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