Repair And Restoration
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Cloudy Poly Remedy?
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Cloudy Poly Remedy?
I have a Carvin 12-String “acoustic” electric with what I think is a poly finish. Over time, the back side has gotten a bit cloudy where the body makes contact with the player. Doing my initial research, it seemed like buffing compound would have done the trick to bring back the shine. I’ve tried 3 different compounds (StewMac ColorTone Med, Mother’s California Gold and No. 7) and nothing has done the trick. What am I missing? Do I need to sand with 1200 grit wet/dry first, then buff?
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7 Replies
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This is an interesting effect on poly. I’ll ask around and see if anyone knows anything about blushing poly. Its hard to tell from the pic, is there any chance it’s an adhesion issue ?
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I don’t see any evidence of it not adhering. The rest of the back looks great to the eye and in hard light. Here’s another area where it looks like the strap has caused some abrasion that’s caused a blush/cloud.
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Do you know if this is a high body moisture contact area ? I ask, because it’s my understanding, that once poly catalyzes it’s pretty much impervious to the elements. This looks more like either moisture trapped in the finish, or moisture in the wood working its way in from the underneath the finish. Either way, as far as I know, the only remedy is to remove the afflicted finish. Which you are doing very slowly with polish. You could kick it up a notch and go with sanding paper. It looks to me like you might find bare wood before you find good finish.
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Appreciate the insights Ian. Sounds like it’s a learn to live with it situation.
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Could be, my experience with poly is so limited though. I’ll keep asking around on this one. Im kinda interested.
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When I conveyed the info to the customer, he said he “had a feeling it might be that”
I didn’t pry for more information unfortunately, but I do think your intel was right.
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If it is poly, it isn’t blushing. It’s delaminating. It has something to do with the styrene’s if I remember right but I’m no chemist.
Buffing won’t do anything to fix it and neither will solvents. I had a conversation about this with a chemist at Axon-Henzen 15 years ago because it always bothered me seeing it in a poly and suspecting it couldn’t be blushing and therefore can’t really be fixed short of stripping and refinishing.
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