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Milky Matt Varnish Problem


Max Headroom

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Help!

 

I’m currently building Eduard’s 109 G2 at the moment and had just about finished the cockpit tub. I then wafted a couple of light sprays of Humbrol Matt varnish over it all. It was a new can of spray, well shaken and done outside in the warm. I then put it in my garage to dry. This is the result.

 

49768667807_91a2395566_b.jpg

 

Not sure if it’s clear, but the cannon breech, seat back and top have a milky look to them. I’m gently rubbing back those areas with a warn piece of wet and dry to see if that make a difference. 
 

Any thoughts or advice please?

 

Trevor

 

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The best way to cure this is to spray some gloss varnish over the top - the cloudiness should then disappear. 
 

Then it’ll be a respray with some more matt. 

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The best way to cure this is to spray some gloss varnish over the top - the cloudiness should then disappear. 
 

Then it’ll be a respray with some more matt. 

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@Work In Progress it was mostly one of Revell’s aqua paints, mixed with other colours to get a sort of RLM66.

 

@tomprobert thanks for the tip. I’ll brush some gloss later and then ditto flat afterwards. 
 

@speedy I swear it was a couple or three quick passes at about a foot away. But I’ll take note and see next time (if I’m brave!).

 

Thanks chaps👍🏻😷

 

Trevor

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Sprayed about a foot away?? that might be a problem as well. The varnish has probably atomised before its reached the surface. Best to get in a little closer and go lightly on the spraying. 
Cheers.. Dave 

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I used to have the same problem with Humbrol Matt (love their gloss though) - I used to describe it as 'frosting' as that's what it looked like.  My solution came from here on BM - when someone suggested I switch to Winsor & Newton Matt - it needs brushing or airbrushing - but it is dead matt & dead clear - just a suggestion.

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54 minutes ago, Rabbit Leader said:

Sprayed about a foot away?? that might be a problem as well.

TBF, the destructions on a Revell spray can say 20-30cm (slightly less than 1ft).

Warmer weather means quicker drying, then you need to get closer. 

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7 minutes ago, alt-92 said:

TBF, the destructions on a Revell spray can say 20-30cm (slightly less than 1ft).

Warmer weather means quicker drying, then you need to get closer. 

Apologies, I missed the Spray Can bit, here’s me thinking it was an airbrush. 

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I honestly wouldn;t be using an aerosol 

1 hour ago, Max Headroom said:

 it was mostly one of Revell’s aqua paints, mixed with other colours to get a sort of RLM66.

OK, then apologies if this is too basic a follow-up, but just to be sure to eliminate the possibility...

 

Was it this Humbrol matt varnish? (black can) humbrol-Enamel-Varnish-Spray.png

https://www.humbrol.com/uk-en/shop/spray-paints/varnish-sprays/49-enamel-varnish-matt-150ml-spray-varnish.html

or this one? (red can) humbrol-spray.png

https://www.humbrol.com/uk-en/shop/spray-paints/varnish-sprays/49-acrylic-varnish-matt-150ml-spray-varnish.html

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@Work In Progress it was the Acrylic spray. As I don’t have an airbrush (at my pace of modelling I can’t justify one!) I have rattlecans for some basic camouflage colours and of course the varnish.

 

I tried @tomprobert’s method and it sort of worked but wasn’t happy, so in the end I touched it up with another home brew match. I’ll grot it up afterwards to blend it in.

 

Cheers!

 

Trevor

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Have you tried Microsol liquid for decal? With brush. It removes varnish, at least it made the job for me in case of old Vallejo matt varnish which caused such problem to me. 

 

J-W

 

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Thanks for the help everyone. Some of those tips are going to be crowbarred into my memory for future reference.

 

Every day is a school day👍🏻
 

This is a great forum 😁

 

Trevor

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Oh, the Humbrol rattlecans.. 
I had two types of frosting; on the surface and within the varnish.
The surface frosting (looking like a somewhat 'fuzzy' layer) can often be cured with a layer of gloss, and then retrying a matt coat.
Internal frosting is worse; the particles that create the 'rough' matt surface are heaped up within the layer itself, resulting in a milky layer. This cannot be solved with a gloss coat. 
Nowadays I don't use Humbrol matt anymore. Had some similar (and worse) experiences with Testors. 
For me, Vallejo seems to work well.

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For the last while I switched to Tamiya acrylic clears and Future wax. Still open to anything that doesn't go bad or yellow over time.

Edited by busnproplinerfan
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I must admit I failed to read it was a can. For aerosol products they must be warm. I keep my Halfords primer & Appliance white in the airing cupboard. Prior to them being used I stand them in hot water and occasionally shake, then put it back in the water. When you think your ready spray away, but watch the volume. It works a treat for me and you can achieve some great finishes.

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