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#11
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painting small steel frame damages
I can't really argue with you, Gene, except for the problem of masking after the sandblasting. It seems that inevitably the powder coat guy doesn't mask something that should have been masked (and then you have to remove the overspray; can be very tedious) or he masks something that shouldn't have been masked, and then it looks like hell. I like to do my own masking job.
Overall, I haven't found powder coat to be that much more durable than single-stage urethane enamel. They each have their strong points. Yes, powder coat has a lot more surface hardness, but how hard a paint do you really need on a bike? Whereas urethane is more flexible and therefore doesn't tend to crack as much. A fortiori because I'm spraying the low-VOC California product and find it to be a very good paint giving excellent results. |
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#12
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painting small steel frame damages
On Friday, May 5, 2017 at 11:49:28 AM UTC-7, wrote:
I can't really argue with you, Gene, except for the problem of masking after the sandblasting. It seems that inevitably the powder coat guy doesn't mask something that should have been masked (and then you have to remove the overspray; can be very tedious) or he masks something that shouldn't have been masked, and then it looks like hell. I like to do my own masking job.. Overall, I haven't found powder coat to be that much more durable than single-stage urethane enamel. They each have their strong points. Yes, powder coat has a lot more surface hardness, but how hard a paint do you really need on a bike? Whereas urethane is more flexible and therefore doesn't tend to crack as much. A fortiori because I'm spraying the low-VOC California product and find it to be a very good paint giving excellent results. That's pretty funny - we have an entire string of having to touch up scratches on bicycle paint and you ask "how hard a paint do you really need on a bike". And the point where by Colnago B-stay enters the frame carrier the urethane paint cracked all around it because of the movement between the B-stand and the frame and you say "urethane is more flexible and therefore doesn't tend to crack as much". Obviously our experiences are exactly opposite. |
#13
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painting small steel frame damages
On Friday, May 5, 2017 at 1:01:34 AM UTC-7, wrote:
no machinery is as compelling as a 275 GTB with nose blasted clean of paint Looks like a Triumph |
#14
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painting small steel frame damages
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#15
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painting small steel frame damages
Almost any city has locations that will
sandblast and powdercoat a frame and fork. This procedure is dirt cheap and the finish extremely long lasting if not the height of glossy finishes. Ha ha, if I went to an establishment which you describe with some of my frames they would probably be stunned. Also, it would require me to strip the bike. No, what I'm talking about is a quick DIY fix. That said, the result is not that bad. But please continue your discussion of any methods to paint or re-paint a bike, it doesn't bother me -- underground experts united http://user.it.uu.se/~embe8573 |
#16
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painting small steel frame damages
Frank Krygowski wrote:
Yes, something like that. For example, many people don't know that adding a bit of blue to a bright orange will tone down its brightness, muting it a bit toward brown. I had that problem with one frame I was touching up. I know the RGB color model of computers! Here are the colors I use in a Linux virtual terminal, the teletypewriters (ttys): normal bright bk r g y bl m c w bk r g y bl m c w r 0 255 0 190 100 175 0 150 90 255 0 255 125 235 90 210 g 0 50 150 190 100 100 180 150 90 75 180 127 125 75 255 180 b 0 50 0 0 255 0 180 150 90 75 0 0 255 235 255 140 With a brush and a bunch of color cans, it should be much harder to get the color one desires, than just mixing red, green, and blue... -- underground experts united http://user.it.uu.se/~embe8573 |
#17
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painting small steel frame damages
On Friday, May 5, 2017 at 3:57:28 PM UTC-4, Doug Landau wrote:
On Friday, May 5, 2017 at 1:01:34 AM UTC-7, wrote: no machinery is as compelling as a 275 GTB with nose blasted clean of paint Looks like a Triumph http://images.hgmsites.net/lrg/1965-...00473657_l.jpg https://www.google.com/#q=COLOR+MATC...MPUETRS&spf=75 PAINT TO RIDE OR RIDE TO PAINT ? |
#18
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painting small steel frame damages
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#19
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painting small steel frame damages
Emanuel Berg writes:
Frank Krygowski wrote: Yes, something like that. For example, many people don't know that adding a bit of blue to a bright orange will tone down its brightness, muting it a bit toward brown. I had that problem with one frame I was touching up. I know the RGB color model of computers! Here are the colors I use in a Linux virtual terminal, the teletypewriters (ttys): normal bright bk r g y bl m c w bk r g y bl m c w r 0 255 0 190 100 175 0 150 90 255 0 255 125 235 90 210 g 0 50 150 190 100 100 180 150 90 75 180 127 125 75 255 180 b 0 50 0 0 255 0 180 150 90 75 0 0 255 235 255 140 With a brush and a bunch of color cans, it should be much harder to get the color one desires, than just mixing red, green, and blue... RGB is an additive color model, which is appropriate for computer monitors. For paints a subtractive color model is more useful. See for example http://www.worqx.com/color/color_systems.htm -- |
#20
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painting small steel frame damages
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