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Cloudy white spots in old finish
http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10137&t=49769
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Author:  Conor_Searl [ Sat Sep 30, 2017 11:41 am ]
Post subject:  Cloudy white spots in old finish

I've tried finding the answer to this on here but haven't had any luck, perhaps I'm using the wrong key words.

What causes the cloudy white spots in old-ish instrument finishes? Is it moisture getting underneath?

Author:  Jim Watts [ Sat Sep 30, 2017 1:22 pm ]
Post subject:  Re: Cloudy white spots in old finish

What was the pore filler?
If it was epoxy, it can turn a whitish gray due to blushing I believe after many years creating this type of effect. I'm currently refinishing an instrument with this problem. I also want to acknowledge here that many people use epoxy and that there may be some brands that don't blush like this. I commonly here z-poxy works and I,m sure there are others too.

Author:  DanKirkland [ Sat Sep 30, 2017 3:04 pm ]
Post subject:  Re: Cloudy white spots in old finish

I've seen shellac get kind of cloudy. If you heat it up with a heat gun it'll usually get rid of them. I don't know what kind of guitar inparticular you're asking about but I'm sure we can find a solution for you if we know what type of finish/guitar and such.

Author:  Glen H [ Sat Sep 30, 2017 4:10 pm ]
Post subject:  Re: Cloudy white spots in old finish

My first suspicion is blushing due to moisture. Sometimes it comes out by just hand buffing it with cloth.

Author:  Conor_Searl [ Sat Sep 30, 2017 4:17 pm ]
Post subject:  Re: Cloudy white spots in old finish

It's a Yamaki, with a lot of big cracks in the finish. The finish seems a little too think to be lacquer, and there's really no checking, like what I've seen in more traditional old guitars. I assume it's some sort of poly. My first guess was that moisture got in under the finish through the cracks.

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