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Pmaj7
 Post subject: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 2:08 pm 
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I'm doing a crack repair on a '90s kamaka which I think is nitro. Using CA like normal, but when I go to scrape it I noticed some of the areas around and under where I put the ca are gummy. Did not notice any gumminess before I started. I did use Napa and a toothbrush to clean out the area as I was initially super gluing slivers in the crack area. Could that have caused the gumminess? What to do?

Gummyness in Seattle

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bluescreek
 Post subject: Re: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 3:43 pm 
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CA will interact with NITRO did you use accelerator? let it set a day or so it may reharden the more I do this the less I use CA

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These users thanked the author bluescreek for the post: Pmaj7 (Fri Feb 19, 2021 3:45 pm)
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Pmaj7
 Post subject: Re: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 3:46 pm 
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Yes, I used accelerator. Gluboost accelerator and CA

Pat

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Chris Pile
 Post subject: Re: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 4:35 pm 
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How old is your CA? Over time it absorbs water and gets thick. That's why I buy new bottles every year, and toss the old ones. Fresh glue is a MUST, no matter what type.

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These users thanked the author Chris Pile for the post: Pmaj7 (Fri Feb 19, 2021 4:58 pm)
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John Arnold
 Post subject: Re: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 4:56 pm 
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I just started using Gluboost accelerator. I do like the performance, but it can temporarily soften old nitrocellulose lacquer. In my experience, the lacquer will harden back up after a few hours.
My old standby accelerator is Insta Set in a squirt bottle. It does not soften lacquer, but it will cause some super glues to blush (turn white or milky).

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These users thanked the author John Arnold for the post (total 2): Hesh (Mon Feb 22, 2021 6:37 am) • Pmaj7 (Fri Feb 19, 2021 4:58 pm)
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Pmaj7
 Post subject: Re: Gummy spots on nitro
PostPosted: Fri Feb 19, 2021 11:21 pm 
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Seems like it has hardened up. Okay no more accelerator! Thanks guys!

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Pmaj7
 Post subject: Re: Gummy spots on nitro
PostPosted: Sat Feb 20, 2021 2:33 pm 
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So I scraped off most of the gummy and let the area harden. Then I put some new Gluboost fill n finish on and let it dry overnight. Most of it is hard but the area that was gummy, the ca did not harden! Hmm....

Pat

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