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Old 11-01-07, 05:59 PM   #1
Zan
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Paint?

Sorry, I didn't know where to post this, so I posted here.

What is the difference between a powdercoat and aniodized paint job on a bike? I'm looking at the Santa Cruz Chameleon, and the site offers two types of paint jobs. One is significantly more expensive than the other... which makes me wonder what the difference is?

Thanks!
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Old 11-01-07, 06:14 PM   #2
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It's a different process. Powder is electrostatically applied dry and baked, and is usually a more durable finish. It is also thicker, which may make it not the best finish for appearance.
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Old 11-01-07, 06:28 PM   #3
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Well...Heres the deal.
Powder coat is thicker and very durable. But, if you chip the paint (chips easier than scratches)and the frame get any rust or corrosion on the bare metal that is chipped it will spread under the rest of the paint like "cancer". You have to treat the chipped area before this happens. (touch up paint like model car paint works great) And, if the frame is not 100% clean before applying powder paint this can still have a "cancer" problem. Sandblasting a frame (Carefully) before applying powder or wet paint is best. Wet paint "Etching" primer is best before wet painting a frame. Etching primer will penetrate the substrate (base metal) and give a good surface for the wet paint to adhere to then clear coat it for a shine and protection.

Anodizing is a treatment done on aluminum frames. It is stripped in an acid bath, rinsed and put in a anodize tank (clear or colors) and sealed. All a chemical process. Kind of like chrome plating but chrome plating is usually done on steel. Does this help?
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Old 11-01-07, 06:39 PM   #4
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Why would you want an anodized paint job over powder coat on an aluminum frame? Just for the anti-chip characteristics?
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Old 11-01-07, 08:24 PM   #5
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Quote:
Originally Posted by Zan View Post
Why would you want an anodized paint job over powder coat on an aluminum frame? Just for the anti-chip characteristics?
It would help if you could look at the bikes. The old anodized Vitus bike frames were beautiful.
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Old 11-07-07, 05:13 PM   #6
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Quote:
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One is significantly more expensive than the other... which makes me wonder what the difference is?
Time & materials = $$$

On a more technical note, anodizing is prone to fading, especially RED!
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Old 11-07-07, 10:34 PM   #7
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Also blue fades. One of the best colors to anodize is Purple. It is also more consistant in color.
To answer Zan's question...First of all you can not anodize over paint. This is done on aluminum and must be done on a clean paint free frame. Anodizing is a chemical process done and the color of anodize is like a dye you put it in. Kind of like dyeing clothing. You chemically treat the frame, dye it the color you want and seal it in other chemicals. All done in big tanks with acids and other chemicals. Powder coating is done by taking a bare frame (no paint no nothing) and putting an electrical charge on the frame.As the color or "powder" passes through the tip of the spray gun it too has a charge opposite the frame. Like + & -. Positive and negative. The paint is attracted to the frame because of this charge. It is still powder at this point. The frame is then put in an oven and baked at about 350 deg F for a short time. The powder melts and bonds the the metal frame. Thus...Powder coating. You can not do this to a frame that has "wet" paint or automotive style paint on it already without removing it all first. Also, lots of decals dont like the heat at 350+ so you have to apply decals after the frame cools or have special decals made for powder coating.
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Old 11-07-07, 11:32 PM   #8
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Take a look at the Spectrum Powder Works website for their FAQ section. Please note that this company is completely unrelated to Tom Kellogg & Jeff Duser of Spectrum Cycles.
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Old 11-08-07, 12:50 AM   #9
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I'd also just add that where you have an anodized frame that is glossy, it usually has a clear top coat of powder coat or clear enamel. Flat anodized frame usually dont have this top coat.
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