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| Fuzzy plastic purfling help needed http://w-ww.luthiersforum.com/forum/viewtopic.php?f=10102&t=4228 |
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| Author: | Tim McKnight [ Sat Dec 24, 2005 1:05 pm ] |
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When I scrape thin .020" & .030" plastic purfling there are areas that get [folded] over into the grain. This leaves the line jagged looking, in spots and not real crisp looking. Anyone else struggle with this or have any suggestions? My scraper is sharp with a good hook on it. I have tried scraping in various directions and that is somewhat beneficial but there always ssems to be some small area that needs help. This seems to be more of a problem on open grain woods too. |
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| Author: | guitarjtb [ Sat Dec 24, 2005 1:10 pm ] |
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I struggle with it also. So, you are not alone. I have not found a solution to it yet. It happens sometimes, and sometimes it is not a problem. I have not figured out the difference yet. |
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| Author: | Tim McKnight [ Sat Dec 24, 2005 1:19 pm ] |
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Thanks for the support James. At least I am not alone. Sometimes I leave them a bit high and sand them down and this works better but the draw back is they don't stay as flat as when they are scraped. |
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| Author: | Brock Poling [ Sat Dec 24, 2005 2:16 pm ] |
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How long did you leave it to dry? I have struggled with plastic "crumbling" due to the acetone glues. They really need to dry out good. Do you think that is what you are seeing? |
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| Author: | tippie53 [ Sun Dec 25, 2005 12:31 am ] |
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It could be that you are not scraping down enough. I often see this just before it "cleans up". I agree that the glue needs to be cured. ( 4hr min ). Also do you have a good clean burr? If your scraper isn't sharp you can have this effect also. There is a knack to shapen them. Good luck, John Ha ll |
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| Author: | Tim McKnight [ Sun Dec 25, 2005 1:37 am ] |
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I leave them dry over night in a warm room. The scraper burr is sharp and fresh and the hook is turned properly. I have used steel scrapers (properly prepared), glass and razor blades. It's particularly noticeable on EIR. |
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| Author: | Evan Gluck [ Sun Dec 25, 2005 3:40 am ] |
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Gotta go with John on this whenever I rebind a repair I get the fuzzies until I scrape a hair further than I think it needs, it is really cool when it cleans up with one or two extra scrapes. Evan |
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| Author: | Howard Klepper [ Sun Dec 25, 2005 3:42 am ] |
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You may want to wait another day if you are using plastic and a glue that softens it. But my advise is to switch to fiber for white and black lines. |
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| Author: | Mjoy [ Sun Dec 25, 2005 3:44 am ] |
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Try using a scraper with a very small burr. I use a dull xacto blade; not the blade, but the part that goes into the handle. use your thumb as a stop to keep off the top/back/side. |
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| Author: | Brock Poling [ Sun Dec 25, 2005 3:50 am ] |
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[QUOTE=Howard Klepper] You may want to wait another day if you are using plastic and a glue that softens it. But my advise is to switch to fiber for white and black lines. [/QUOTE] I have learned to wait longer on plastic too. That seemed to fix my problem. |
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| Author: | Mario [ Sun Dec 25, 2005 4:07 am ] |
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Yeah, wait longer. All adhesives soften the plastics by quite a bit. Give it 3 days, sharpen the scraper, but DON'T turn a hook, and all will go perfectly. |
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| Author: | Bobc [ Sun Dec 25, 2005 4:09 am ] |
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I've been using a single edge razor blade and turn a small hook on it. Works good if the bindings are hard again. Waiting seems to be the key or like Howard suggests swithch to fiber. |
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| Author: | tippie53 [ Sun Dec 25, 2005 8:36 am ] |
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My scrapers are made from tool steel , I made my early ones from old hack saw blades. I use a good oil stone to sharpen them. It is east to burnish an edge. I like them 1/2" to 3/4" wide and about 3 inches long. I put about a 10 degree angle or less then roll the edge. I have them in all kinds of shapes and sizes as you can find lots of uses . |
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| Author: | Tim McKnight [ Sun Dec 25, 2005 9:13 am ] |
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Thanks fellas, I'll try again tomorrow as they will be three days old then. I used some maple/fiber purflings in this batch too and I didn't have any issues with them. |
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