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Old 11-30-2011, 03:46 PM   #1 (permalink)
 
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Default CA Glue Finish Chip Out

Does anyone have any suggestions for keeping the ends of the pen blank from chipping when you are doing a CA Glue finish?
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Old 11-30-2011, 03:50 PM   #2 (permalink)
 
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When and how are they chipping out. If happening when trimming the flash on the ends try using a sanding mill instead.

Ive had it chip before when I got too aggressive when trying to use a skew bring the edges back down. I rarely have to do this anymore and stick to wet sanding with micromesh.

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Old 11-30-2011, 03:55 PM   #3 (permalink)
 
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usually it happens when breaking the bushings free from the blanks. I tap them against the lathe to break them free, but try to do it very gently. I put about 10-15 coats, so I am thinking maybe less coats will be the key.
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Old 11-30-2011, 04:00 PM   #4 (permalink)
 
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Waxing the bushings helps alot
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Old 11-30-2011, 04:03 PM   #5 (permalink)
 
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I'm sure you'll get several different ways of doing this ;) Do you coat your bushing with paste wax before starting your CA finish? Taping them is not the preferred method. IF I get stuck bushings I will, with the lathe off take a xacto knife and score the built up CA on the bushing side of the bushing to blank joint until the bushing come loose. The method I prefer is to not use bushings, I do my finishing between centers on the lathe. But like I said you will get quite a few different methods. If you want to use bushings coat them with paste wax (it only takes a dab smeared on with your finger) before starting. Just be sure to keep the wax off the blank.
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Old 11-30-2011, 04:28 PM   #6 (permalink)
 
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You can buy the Delrin Bushings (pensbyhans dot com) which should resolve this, but honestly, I use the Delrin and due to the CA coating it still coats the Delrin bushings. With that being said I use an exacto knife to round the bushing to cut through the CA. After that the tap and angle of the bushing should break the seal. Once I have this blank off the bushings I square it on the sander again and pour thin CA on a paper towel and dab the fresh ends of the blank on to seal it all back up again so wet sanding doesn't put moisture into the wood. Hope that helps
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Old 11-30-2011, 04:39 PM   #7 (permalink)
 
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I prefer to do my ca finish between centers without any bushings. Just don't over tighten the tailstock agianst the blank as you don't want to flair the tubes.
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Old 11-30-2011, 05:13 PM   #8 (permalink)
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I do all my CA finishing between centers with out bushings, just the blank between centers. I sometimes get a little too much CA over the edge and end up gluing the barrel to the live and/or dead center. I always score the hardened CA with an exacto knife to try and avoid the problem of the glue lifting off the wood. Sometimes the finish still will separate from the barrel. About 95%+ of the time, I've been successful regluing it back by using an extender tip on the regular tip of the glue bottle and placing a microdrop of thin CA on the end of the barrel. The thin CA will wick into the space and it will not be noticeable. If I get too much and it makes the edge uneven, I use a sanding mill to even the edge up.
Be very careful not to use too much CA or it can run down the barrel and glue the barrel to your fingers, DAMHIKT.
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Old 11-30-2011, 05:15 PM   #9 (permalink)
 
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I tap my bushings off, too and I find the finish damage during assembly. Try laying out some 600 grit deat flatand sanding the ends before assembly. It takes a light touch and some practice, but I almost never have those chipouts anymore. Spending time polishing and thinning the finish out helps, too. Really thick layers of CA chip out a lot more when you gotta knock the bushings off.
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Old 11-30-2011, 05:55 PM   #10 (permalink)
 
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You can remove the bushings half way thru clean up the edges and finish it with a thinner final set of coats.
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