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#21
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painting small steel frame damages
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#22
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painting small steel frame damages
On Fri, 05 May 2017 23:04:10 +0200, Emanuel Berg
wrote: 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 The first frame and fork I took to the shop I use now, the "head Office Girl" walked me back to the guy that actually did the work and we had a discussion about what to do and not do. Since that first frame the only thing we've discussed was when I wanted a two color frame, where to mask it. |
#23
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painting small steel frame damages
Radey Shouman wrote:
RGB is an additive color model, which is appropriate for computer monitors. For paints a subtractive color model is more useful. Yeah, how does it really work? If you use the color wheel, and the color you wish is between color A and color B, but two thirds from color A and only one third from color B, does that mean you should mix one third A and two thirds B to get it? -- underground experts united http://user.it.uu.se/~embe8573 |
#24
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painting small steel frame damages
add a small amount z to a small test volume of x ... 'measure' both volumes
when close try a volume for a small out of sight chip paint let dry Both dry and larger volumes will skew the results visit the paint Store fir a demo |
#25
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painting small steel frame damages
On Friday, May 5, 2017 at 2:04:14 PM UTC-7, Emanuel Berg wrote:
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 Too bad I can't download pictures of some examples. |
#27
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painting small steel frame damages
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".
Apologies if I'm hijacking the thread, Gene, but I don't think that paint hardness and scratch/chip resistance are the same thing. For example, early Dupont Imron paint was very hard but chipped easily. If anybody knows more about paint than I do, feel free to correct me. |
#28
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painting small steel frame damages
On 5/5/2017 10:31 PM, wrote:
On Friday, May 5, 2017 at 6:44:59 PM UTC-7, John B Slocomb wrote: On Fri, 5 May 2017 07:42:41 -0700 (PDT), wrote: On Thursday, May 4, 2017 at 5:52:15 PM UTC-7, wrote: Emmanuel, I'm afraid I am not big on repairing chips in a frame's paint. When the bike gets too chipped and has too many rust spots to suit me, I strip the components off the frame, sandblast it and paint it with single-stage automotive paint. Although 2-stage (clear coat) jobs are popular these days, I think clear coat would look obviously inauthentic. IMHO, single stage paint more closely duplicates the original finish. You need a fairly good-sized air compressor to run a sandblaster. I use a Campbell Hausfeld 2-stage model that delivers about 18 SCFM and has an 80-gallon air tank. Just about any portable, pressure-fed sandblaster will do the job. Avoid siphon-fed blasters. 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. The shop I use does a two coat powder coating with "clear coat" as the second layer. It does produce a fairly shiny coating although not as glossy as "22 coats of hand rubbed lacquer". I live one mile away from CycleArt. I dropped in and asked what he wanted for a paint job and he said $1200 with decals and a minimum of two months lead. The powder coat complete was $50 the next day. That's pretty interesting. About ten years ago, I welded up some nice ornamental railings for our indoor stairs and outdoor balcony. I looked into powder coating, and while I don't remember the price, I decided it was exorbitant. It was much, much higher than $50! -- - Frank Krygowski |
#29
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painting small steel frame damages
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#30
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painting small steel frame damages
On Fri, 05 May 2017 21:34:40 -0400, Radey Shouman
wrote: 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 Cyan, Magenta, Yellow and Black |
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