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Old 01-27-2018, 12:12 PM   #1 (permalink)
 
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Default White spots

Any ideas on what would cause these white spots showing up after applying a CA finish?


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Old 01-27-2018, 12:19 PM   #2 (permalink)
 
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Unless you can find a specific pattern of the in the wood, for me they occur from CA dust catch in pits or from polish gathering in pits. I sometimes have problems with my accelerator application causing what the call foaming, which makes the really bad, but occasionally only have a few. If bad enough, I turn them off with a scraper, and reapply the CA. If not too bad I may apply the next step of polish, a wax or a friction polish over the top and it often hides or removes the white spots.


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Old 01-27-2018, 12:24 PM   #3 (permalink)
 
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Dust from not cleaning off blank before applying first coat of CA. Need to blow off blanks, wipe down with denature alcohol. Also when applying CA make sure you keep blank clean between coats, like maybe having a PT sticking.
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Old 01-27-2018, 01:22 PM   #4 (permalink)
 
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I definitely clean the wood before applying the finish with alcohol. Should I be lightly sanding between coats of CA?


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Old 01-27-2018, 02:55 PM   #5 (permalink)
 
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I am reasonably certain that the spots are due to small pits in the CA. This is a common issue with open grained woods, but can happen with anything. My approach is to build up CA, sand, clean, repeat. Inspect closely, when the pits are gone then proceed with MM or buffing. Here is one thread that discusses: Cocobolo Pen Finish Problems

Search Wenge, pits, or spots and you’ll find more discussion
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Old 01-27-2018, 03:00 PM   #6 (permalink)
 
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Dehn0045 I am going to try that approach on my next one. Also going to check out the link you provided. Thank you very much.


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Old 01-27-2018, 03:29 PM   #7 (permalink)
 
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No problem, I hope you are able to resolve the issue without too much trouble. BTW, is the pen in the pic made from padauk? That was the first wood that I encountered this problem with...
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Old 01-27-2018, 06:22 PM   #8 (permalink)
 
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Yes it sure is padauk. Believe it or not the spots completely disappeared after rubbing it down with pledge furniture polish.


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Old 01-27-2018, 06:31 PM   #9 (permalink)
 
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Clean off the dust with a can of compressed air used for computer keyboards, etc. I now have an air compressor but need to find a permanent place for it.
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Old 01-28-2018, 08:32 AM   #10 (permalink)
 
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I recently found an easy way to take care of this without having to sand below the pits and redo everything. When I get small white spots like that, I take a q-tip with acetone and dab the white spot. That will generally turn the spot clear again (some bigger spots take a small bit of rubbing too) and allow you to continue adding coats until they're filled, then finish like normal. This trick has saved me a LOT of time while learning CA finishes.
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