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Flat Coat Looks Milky!

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  • Member since
    July 2003
  • From: Bicester, England
Flat Coat Looks Milky!
Posted by KJ200 on Tuesday, February 15, 2011 2:41 PM

My last few models have all suffered from a flat coat that has dried with a milky speckly appearance.

I have tried my usual Gunze flat coat thinned with Tamiya thinner and stirred for at least a minute beforehand.

No joy.

So tried Humbrol Matt Coat...

....exactly the same issue.

I never used to have these problems, and having tried both acrylics & enamels with the same results can only think it must be my technique.

Any ideas what I'm doing wrong?

Karl

Currently on the bench: AZ Models 1/72 Mig 17PF

  • Member since
    March 2010
  • From: Democratic Peoples Republic of Illinois
Posted by Hercmech on Tuesday, February 15, 2011 2:49 PM

If you have stirred it well and thinned it, I can only think of two possible causes. The first being that humidity is very high and it is not drying properly, or you may be laying it on too thick. I have had both things cause it for me.


13151015

  • Member since
    July 2003
  • From: Bicester, England
Posted by KJ200 on Tuesday, February 15, 2011 2:56 PM

I've just put a very light mist coat on my CH 46 and that is looking better with the Matt Coat.

I'll give it another coat later and see how it goes.

Thanks for the advice.

Karl

 

 

Currently on the bench: AZ Models 1/72 Mig 17PF

  • Member since
    April 2005
  • From: Monster Island-but vacationing in So. Fla
Posted by carsanab on Tuesday, February 15, 2011 3:01 PM

could be a thinner problem too....some brands dont "play well" with others.....I began using rattle can clear coats...the Tamiya ones work really nice...setlle in real nice to the panel lines...no mixing no worries....if you dont like the can...decant them and the use your AB...

good luck

carlos

 Photobucket

  • Member since
    November 2005
Posted by Anonymous on Tuesday, February 15, 2011 3:07 PM

The reason it looks milky is that there is too much "flat medium" building up on your model...all flat coats are is transparent "rough" pigment to diffuse light from your model...when these particles build up too thick they give the model a chalky appearance...as for why?  Could be a number of reasons... 

  • Member since
    April 2005
  • From: Monster Island-but vacationing in So. Fla
Posted by carsanab on Tuesday, February 15, 2011 4:13 PM

Manstein's revenge

The reason it looks milky is that there is too much "flat medium" building up on your model...all flat coats are is transparent "rough" pigment to diffuse light from your model...when these particles build up too thick they give the model a chalky appearance...as for why?  Could be a number of reasons... 

could be a problem with the CATalyst....you know fast their reaction times can be.....

c

 Photobucket

  • Member since
    July 2003
  • From: Bicester, England
Posted by KJ200 on Friday, February 18, 2011 2:52 AM

Thanks for the comments guys, I really hadn't considered the problem would be thinning related.

Something about being too close to the problem!

I mixed up a fresh batch of Gunze Flat & Tamiya Thinner, at a ration of 1:2 varnish to thinner and applied that to an old kit I'd painted gloss black.

Et voila...

.......nice  flat finish, and no speckling.

Thanks

 

 

 

 

Currently on the bench: AZ Models 1/72 Mig 17PF

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