Brad Dorsey Posted March 19 Report Share Posted March 19 A friend wants to remove the corduroy texture from a bit of spruce replacement wood to match the glassy-smooth texture of the rest of the top. What is the best way to do this? Sanding? Scraping? Something else? Quote Link to comment Share on other sites More sharing options...
Michael Richwine Posted March 19 Report Share Posted March 19 I would scrape with a sharp scraper or sand with a hard block. At the shop where I learned, we took extra steps to produce corduroy in spruce and ripples in maple... Quote Link to comment Share on other sites More sharing options...
Michael_Molnar Posted March 19 Report Share Posted March 19 Right. For clarification, a scraper with a burr edge is called a sharp scraper. A razor blade does not have a burr edge, and it accentuates the spruce corduroy. Quote Link to comment Share on other sites More sharing options...
donbarzino Posted March 19 Report Share Posted March 19 I would dampen the surface of the spruce to let it do its grain raising thing and then scrape it flat after drying. Quote Link to comment Share on other sites More sharing options...
nathan slobodkin Posted March 19 Report Share Posted March 19 If the surface to be matched is really glass smooth then it might help to size it after darkening the wood to the correct color then scrape or sand after the sizing has dried. Quote Link to comment Share on other sites More sharing options...
Brad Dorsey Posted March 20 Author Report Share Posted March 20 20 hours ago, Michael Richwine said: …we took extra steps to produce corduroy in spruce and ripples in maple... What are those steps? Quote Link to comment Share on other sites More sharing options...
Bill Yacey Posted March 20 Report Share Posted March 20 22 hours ago, Michael_Molnar said: Right. For clarification, a scraper with a burr edge is called a sharp scraper. A razor blade does not have a burr edge, and it accentuates the spruce corduroy. For flat surfaces or a large radius convex surface, I have found the Richards single edge razor blades used in their hand scrapers very useful when a slight burr is turned on the edge. I've also reground and sharpened them to specific profiles successfully. Razor Blade Quote Link to comment Share on other sites More sharing options...
Michael_Molnar Posted March 20 Report Share Posted March 20 Sharp corners on a razor blade leave marks on tight rounded surfaces. I grind off the blade’s corners or make the blades narrower. Make sure you dispose the used blades in a “sharps box”. I use a jar with slotted lid for inserting blades. Quote Link to comment Share on other sites More sharing options...
Michael Richwine Posted March 21 Report Share Posted March 21 13 hours ago, Brad Dorsey said: What are those steps? Lots of ways; wet wood surface and a dull scraper is a start, Depends on whether you want the springwood or summer wood to pop. Main thing is to get the spring wood and summer wood to swell, then cut them back unevenly, or to cut the dry wood back unevenly with abrasive. It develops on its own over time. I was just noticing it on the inside of the top of a 100 year old violin that had originally been finished really cleanly. There's a discussion in the archive if you want to look for it, or just google corduroy on violin. Quote Link to comment Share on other sites More sharing options...
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