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Powder Coating
The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue.
The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? |
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#2
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Powder Coating
On 2017-08-16 06:53, wrote:
The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html For next time: Powder coat places are very much used to masking areas but they have to be told which ones. With ultrasound machine chassis we had them do that all the time because some panels had to make electrical contact for safety, EMC, noise and other reasons. -- Regards, Joerg http://www.analogconsultants.com/ |
#3
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Powder Coating
On Wednesday, August 16, 2017 at 7:15:01 AM UTC-7, Joerg wrote:
On 2017-08-16 06:53, wrote: The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html For next time: Powder coat places are very much used to masking areas but they have to be told which ones. With ultrasound machine chassis we had them do that all the time because some panels had to make electrical contact for safety, EMC, noise and other reasons. That did give me the idea that I can't use my miniature wire brush on the rotary tool. I don't know if lacquer thinner could work on powder coat but I can certainly try. I powder coated my wife's Mercian, spray painted on the contrasting headtube color and then put on the decals. That bike road coast to coast and there is only one small nick in the powder coat from laying it in the station wagon on top of a wheel. Otherwise after 20 years it looks almost new. |
#4
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Powder Coating
"Joerg" wrote in message ... On 2017-08-16 06:53, wrote: The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html Paint is totally different to powder coat, AFAIK: traditional masking will tend to rip off a strip of coating where you want it to stay. Powder coating is most often done electrostatically - I vaguely remember something about painting melted wax onto the chrome bits. The right kind of wax is an insulator that doesn't electrostatically hold the sprayed on powder - or not so much anyway. The end result still needs a bit of finishing round the edges - but you shouldn't end up having to strip it back and start over. |
#5
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Powder Coating
On Wednesday, August 16, 2017 at 9:53:48 AM UTC-4, wrote:
The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? Get whomever does the powder coating to mask off the chromed areas you don't want the powder coat to go onto. Cheers |
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Powder Coating
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#7
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Powder Coating
On Wed, 16 Aug 2017 21:39:23 +0100, "Ian Field"
wrote: "Joerg" wrote in message ... On 2017-08-16 06:53, wrote: The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html Paint is totally different to powder coat, AFAIK: traditional masking will tend to rip off a strip of coating where you want it to stay. Powder coating is most often done electrostatically - I vaguely remember something about painting melted wax onto the chrome bits. The right kind of wax is an insulator that doesn't electrostatically hold the sprayed on powder - or not so much anyway. The end result still needs a bit of finishing round the edges - but you shouldn't end up having to strip it back and start over. I usually have bike frames powder coated in two or more colors and the people that do it here are quite adept at masking. Whether to cover chrome plating or just where two colors join. I'm told that they use a "special masking tape" that will withstand the oven temperature. -- Cheers, John B. |
#8
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Powder Coating
On 2017-08-16 13:39, Ian Field wrote:
"Joerg" wrote in message ... On 2017-08-16 06:53, wrote: The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html Paint is totally different to powder coat, AFAIK: traditional masking will tend to rip off a strip of coating where you want it to stay. Powder coating is most often done electrostatically - I vaguely remember something about painting melted wax onto the chrome bits. The right kind of wax is an insulator that doesn't electrostatically hold the sprayed on powder - or not so much anyway. The end result still needs a bit of finishing round the edges - but you shouldn't end up having to strip it back and start over. It's being done: http://www.powdercoatguide.com/2013/08/masking.html The edge line won't always be as sharp as with paint but on the near the inside of the rear dropouts I guess it won't even be a cosmetic issue. -- Regards, Joerg http://www.analogconsultants.com/ |
#10
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Powder Coating
"John B." wrote in message ... On Wed, 16 Aug 2017 21:39:23 +0100, "Ian Field" wrote: "Joerg" wrote in message ... On 2017-08-16 06:53, wrote: The colors and consistencies you can get in powder coating is fantastic. I found some slightly metallic very bright blue. The problem is that powder coaters are not bicycle painters so the rear dropouts that are chromed will be covered as well as everything else. So does anyone have an idea of how to remove the powder coating from the dropouts without destroying the chrome at the same time? AFAIK it's done the traditional way: https://itstillruns.com/remove-paint...e-4809619.html Paint is totally different to powder coat, AFAIK: traditional masking will tend to rip off a strip of coating where you want it to stay. Powder coating is most often done electrostatically - I vaguely remember something about painting melted wax onto the chrome bits. The right kind of wax is an insulator that doesn't electrostatically hold the sprayed on powder - or not so much anyway. The end result still needs a bit of finishing round the edges - but you shouldn't end up having to strip it back and start over. I usually have bike frames powder coated in two or more colors and the people that do it here are quite adept at masking. Whether to cover chrome plating or just where two colors join. I'm told that they use a "special masking tape" that will withstand the oven temperature. Probably OK if you apply it thin enough, but that stuff has tensile strength. |
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