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Milky/cloudy Finish With Clear Coat

 
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Old 02-20-2013, 12:24 PM   #21
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Re: Milky/cloudy Finish With Clear Coat


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Does steel wool have oil on it?
Yes. That's what stops it from rusting.
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Old 02-20-2013, 02:16 PM   #22
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Re: Milky/cloudy Finish With Clear Coat


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First off, "he" is obviously a "she"! Look at her pict!

As far as the black spots, it would be hard to see black spots on a black finish.

I still say it has to do with some type of oil being trapped under the top coat, & it's creating the milky look. I've never had an issue with alchohol causing a problem with waterbournes, but anything is possible.

Joe
I think oil would be more likely to fisheye
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Old 02-20-2013, 03:04 PM   #23
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Re: Milky/cloudy Finish With Clear Coat


I've never used any waterborne products but have done a lot of painting in my day, and have experienced "blushing" in the finish quite a few times. I would just sand it down smooth and recoat. My best paint jobs were the ones that I sprayed on a few heavy coats, let dry a few days, wet sand smooth with 600 and carefully apply one coat, and walk away. Comes out like glass. High humidity and really heavy coats should be avoided.

Last edited by rustyjames; 02-20-2013 at 03:07 PM.
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Old 02-20-2013, 03:16 PM   #24
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Re: Milky/cloudy Finish With Clear Coat


Thanks Railman and to everyone who responded. I am still up in the air about what I am going to do but nice to have a place to troubleshoot
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Old 02-20-2013, 08:52 PM   #25
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Re: Milky/cloudy Finish With Clear Coat


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I've never used any waterborne products but have done a lot of painting in my day, and have experienced "blushing" in the finish quite a few times. I would just sand it down smooth and recoat. My best paint jobs were the ones that I sprayed on a few heavy coats, let dry a few days, wet sand smooth with 600 and carefully apply one coat, and walk away. Comes out like glass. High humidity and really heavy coats should be avoided.
My first thought was about the humidity levels when spraying them.
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Old 02-20-2013, 09:10 PM   #26
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Re: Milky/cloudy Finish With Clear Coat


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My first thought was about the humidity levels when spraying them.
I've never work ed with waterbase "lacquer"... Only acrylic/polys...

Only time i have seen milky whites is in high humid conditions but always will dry clear.. Have seen it happen over staining when stains not thoroughly dry.
I have stearate base lacquer turn white in similar.. High humidity.. To correct white is solvent lacquers you simply reactivate it with lacquer thinner/appropriate solvent..
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Old 02-20-2013, 10:16 PM   #27
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Re: Milky/cloudy Finish With Clear Coat


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If he steel wooled it there would most likely be black spots all over the work piece from oxidation by the water. Might be hidden by the black under coat. We need pics...
I don't think this is likely. People talk about it, but Ive used steel wool pathologically for a very very long time. Maybe if you use the cheap steel wool that powders, and you embed little bits into the piece.
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Old 02-20-2013, 11:37 PM   #28
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Re: Milky/cloudy Finish With Clear Coat


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Hoping someone can help me troubleshoot this problem...I refinish furniture for people and when I say "refinish", I mainly spray them a color. I have been using SW Kem Aqua Plus pigmented lacquer for the past year or so and really like it because of it's durability, drying time and the fact that is it a waterborne product. I typically do not put on a clear coat after the pigmented lacquer topcoats but in this particular project, I had to. I spraying out a customers kitchen cabinet doors and drawers and used the Kem Aqua straight black in the 40/satin sheen (HATE WORKING WITH BLACK LACQUER!). Because I did a rub through technique using denatured alcohol, which looks great, I needed to put on a clear coat to take care of the dullness the alcohol made to the surrounding area of rub thru. I used Valspar Zenith waterborne clear lacquer in satin over top and it looks horrible! Very milky and cloudy and not a pretty black( And suggestions besides burning all the doors...which is what I want to do because of all the time I have invested! Did I mention I hate spraying black?!? Any suggestions of helpful solutions would be appreciated thanks
Why didn't you use Kem Aqua Plus clear MRE or BRE? I believe you have a compatablity problem. I shoot KA and KA+ all the time and have never had it turn milky.

Wet sand through 400, shoot KA+ , cross fingers.
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Old 04-11-2013, 09:40 PM   #29
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Re: Milky/cloudy Finish With Clear Coat


I realize this is probably over and done with, but wanted to say that you have one culprit. SATIN FINISH. Any clear satin has a powder formulated into it that dulls the finish down. It's just regular gloss with powder in it to make it satin. That's why satin has to be stirred a lot, whereas gloss just needs a quick stir. After spraying satin, you can expect it to be cloudy while it's wet, but it should fade to crystal clear within a short time. I've also learned the hard way that satin waterbased finishes(particularly urethanes) are very finnicky. You have to time your recoats. Too short or too long will yield unpleasant results.
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Old 04-11-2013, 09:45 PM   #30
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Re: Milky/cloudy Finish With Clear Coat


thanks for the reply Derek1157! Even though yes, it is too late for this particular project it is very helpful for my or others future projects Thanks for the info. I believe you have a very valid point and believe your thoughts were correct on this particular project. Lessoned learned for sure! Just thankful the customer loved the finish and I did not have to obsess over it as much as I anticipated!!!
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Old 04-11-2013, 09:58 PM   #31
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Re: Milky/cloudy Finish With Clear Coat


You're welcome
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Old 04-11-2013, 10:17 PM   #32
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Re: Milky/cloudy Finish With Clear Coat


Try using a solvent in a small spot which wont show. If it disolves and the blushing disapears at least you know what it is (trapped moisture).

If you can do this on a test area first it is best. I have had this issue before with both solvent borne products as well as water borne. Techs I spoke with all agreed that solvent will allow for the release of the water by disolving the finish long enough for it to evaporate.

It is a tricky business at best but what else are realistic options...???

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