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White "frosting" with Humbrol Clear Gloss


Dennis E.

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Hello everyone

 

I've just used Humbrol Clear for the first time...  Sprayed over Xtradecals and AK paint on a Tamiya 1:32 Spitfire.  I've now got a model which is covered in an uneven white frosting.  Does anybody have any idea what might have happened and what I might do about it?

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Looks like you have used an enamel based product over an acrylic, they are not really compatible Dennis I’m afraid.  Probably need to strip and start again I fear, even if you could save it there is the possibility that the clear coat would craze or crack later on. 

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Never had this problem before. I regularly spay enamel over acrylic. If it's matt coat that's causing the problem ….needs to be well mixed and thinned. Try a flash of gloss over an affected area that has been lightly rubbed down. It might work. You have nothing to loose.

 

Dick

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I am a fan of Humbrol Acrylic Clear Gloss & use it regularly.  I have had 'clouding' on a couple of occasions - but never 'frosting'.

 

I have deduced that excess microsol / microset residue was a problem for me as the clouding was apparent around decals.  I now brush a little water over decals once they are fully set - just to get rid of the residue. 

 

If I forget and fogging appears a brush coat of more gloss over the top clears it up - so all may not be lost - give it a go and good luck.

 

Steve 

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Thanks to everybody who responded so quickly - particularly Iain and Steve who, I think have nailed it.  I had settled the decals with Microset/sol and the model was in the cold overnight (I spray in the shed!).  Looks like the 'perfect storm'.

I'll try another coat of gloss over the top - it's either that or strip the lot off!

 

Thanks again for your input.

 

Dennis

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12 minutes ago, Dennis E. said:

Thanks to everybody who responded so quickly - particularly Iain and Steve who, I think have nailed it.  I had settled the decals with Microset/sol and the model was in the cold overnight (I spray in the shed!).  Looks like the 'perfect storm'.

I'll try another coat of gloss over the top - it's either that or strip the lot off!

 

Thanks again for your input.

 

Dennis

Just another thought / tip - when I have had this problem I use a broad flat brush and almost brush the milkyness out - don't panic - be liberal with the gloss and it will level itself out as it dries.  You might consider moving it into the house for this bit too - Humbrol gloss has no odour.

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Thanks for all that folks.  I brushed on another (heavy) coat of Clear yesterday and kept it warm overnight - no more white marks!  I've got some damage to the decals but nothing irreparable.

You are all officially heroes!

 

Thanks again.

 

Dennis

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  • 2 weeks later...

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