Members JEFF-B Posted November 15, 2013 Members Share Posted November 15, 2013 Is there a way to remove the cloudiness from a finish with a polyurethane coat? I suspect it has to do with improper wood treatment during construction and/or heat/humidity stress. I think not but maybe there is a way. Thx. Jeff B Quote Link to comment Share on other sites More sharing options...
Members Opa John Posted November 15, 2013 Members Share Posted November 15, 2013 I don't think there's any way to do it. The cloudiness is usually under the finish caused by dampnes that has seeped through from the inside. I had a guitar with this same cloudiness on the back. I might also mention that this guitar had been stored in a lower level closet for about 10 years untouched. May have drawn dampness from being in there for so long locked up in a tight case. I tried just about every commercial product on the market to no avail. I eventually sold that guitar, but it wasn't due to the cloudiness. Fortunately, it was only a "$200 guitar", so not a big deal. It was just time for it to go. Quote Link to comment Share on other sites More sharing options...
Members Freeman Keller Posted November 15, 2013 Members Share Posted November 15, 2013 JEFF-B wrote: Is there a way to remove the cloudiness from a finish with a polyurethane coat? I suspect it has to do with improper wood treatment during construction and/or heat/humidity stress. I think not but maybe there is a way. Thx. Jeff B First, a few questions. Is this a factory finish? When you say "polyurethane" - how do you know that and what kind of poly (air cured, catalyzed - if so what kind)? Is the entire finish cloudy or just spots? Does it appear to be on the surface or at the wood level or within the finish itself? Why do you think the wood was improperly treated (most factories treat their wood properly)? What kind of heat or humidity stress has the guitar been subject to? Do you know if it was ever shipped in a cold time of the year and taken directly into a warm room (and opened)? Have you used any cleaners or polished on the finish? Depending on some of the answers above I might suggest using micromesh or polishing compounds with a buffer, but that might also make it worse. Quote Link to comment Share on other sites More sharing options...
Members JEFF-B Posted November 15, 2013 Author Members Share Posted November 15, 2013 It's a old yamaha LD-10. All I have to go on is the yamaha Internet site since this was an online purchase reason being I'm never going to buy a perfect LD-10 and a flawed one is better than nothing. This is the same guitar I posted pic of the top separation so I suspect it has suffered heat stress or low humidity at some point. It looks to be underneath the finish and it is all over the guitar in equal proportions. I don't think it can be fixed although I am going to be more aggressive about it than I would with my Martin D41. Quote Link to comment Share on other sites More sharing options...
Members JoeJazz Posted November 15, 2013 Members Share Posted November 15, 2013 JEFF-B wrote: Is there a way to remove the cloudiness from a finish with a polyurethane coat? I suspect it has to do with improper wood treatment during construction and/or heat/humidity stress. I think not but maybe there is a way. Thx. Jeff B Sometimes it's the simple answers that work. Be sure it's not just build up from previous polishes. Some of these 3 step polish kits can go awry and leave layers of polish that's difficult to remove. Quote Link to comment Share on other sites More sharing options...
Members JEFF-B Posted November 15, 2013 Author Members Share Posted November 15, 2013 My plan is to clean with naphtha followed by Meguiar's X. Quote Link to comment Share on other sites More sharing options...
Members Paul42 Posted March 23, 2021 Members Share Posted March 23, 2021 Hi Jeff-B, How did the naptha and Meguiars work out for you? I have a Yamaha APX-10D with a cloudy finish all over and I'm hoping to find a solution to it. So far, lemon oil doesn't work. I tried it for 48 hours with no sign of change. Quote Link to comment Share on other sites More sharing options...
Members DeepEnd Posted March 24, 2021 Members Share Posted March 24, 2021 10 hours ago, Paul42 said: Hi Jeff-B, How did the naptha and Meguiars work out for you? I have a Yamaha APX-10D with a cloudy finish all over and I'm hoping to find a solution to it. So far, lemon oil doesn't work. I tried it for 48 hours with no sign of change. Unfortunately, if Jeff-B tried naphtha and Meguiars it was seven years ago. He hasn't even been around since December, 2013. That's how old this thread is. Quote Link to comment Share on other sites More sharing options...
Members jeffmusic2801 Posted April 1, 2021 Members Share Posted April 1, 2021 It did not work, no difference. Quote Link to comment Share on other sites More sharing options...
Members Liv4Muzic Posted July 20, 2023 Members Share Posted July 20, 2023 I just pulled my acoustic guitar out of its case after sitting for about a year. I agree the problem is definitely under the finish! Because after playing it for about 2 hours it wasn’t the whole guitar that was hazy, but specifically where the heat from my body was became un-hazed. I’m inspecting it for any nick or crack assuming moisture may have been able to creep it’s way in? Now I’m thinking reading other comments that as a whole, if the wood inside was not sealed, even though it was in a case, moisture or heat fluctuation is the culprit! I live near the beach and humidity is always up. Quote Link to comment Share on other sites More sharing options...
Moderators daddymack Posted July 23, 2023 Moderators Share Posted July 23, 2023 leave the guitar out in the sun....and order a dehumidifier for the case. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.