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Thinning polyurethane varnish

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  • Member since
    August 2004
  • From: Forest Hill, Maryland
Thinning polyurethane varnish
Posted by cwalker3 on Sunday, September 4, 2022 8:19 AM

I picked up some of Vallejo's poly varnish but it seems too thick to spray out of the bottle. Any ideas on what to thin it with?

Cary

 


  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, September 4, 2022 8:52 AM

Here's my 2 cents

Don't thin it. Vallejo say use .4mm or larger needle, I've used .5. Like most Vallejo products, sprays best at 20-25 PSI. If you have a fan pattern airbrush, even better. (I've not even tried it with mine, yet, as it has worked fine for the small jobs with a conventional .5mm needle/nozzle)

I've been experimenting with it off and on for the past couple of months, and liking it. I got it to try over chrome finishes, specifically Alclad and Molotow, and it's so far the best of all of the clears I've tried for that.

Seems to be a very nice clear for general use, too.

Wish you good luck with it.

  • Member since
    March 2022
  • From: Twin cities, MN
Posted by missileman2000 on Sunday, September 4, 2022 8:57 AM

If you do need to thin polyurethane, or for cleanup, mineral spirits works.

 

  • Member since
    August 2004
  • From: Forest Hill, Maryland
Posted by cwalker3 on Sunday, September 4, 2022 9:28 AM

Thanks guys. 

Cary

 


  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, September 4, 2022 9:31 AM

You're welcome.

If you think of it, let us know how the product works for you.

  • Member since
    August 2004
  • From: Forest Hill, Maryland
Posted by cwalker3 on Sunday, September 4, 2022 9:44 AM

I sprayed it using a Badger 105 airbrush with a general purpose needle at 20 psi. Needle size wasn't listed on the packaging but I figured a GP needle would spray a larger pattern so thats what I used. The varnish sprays very slowly, acting like it's too thick. I guess the value of this is that it makes you apply light coats. What I ended up with was a very even coating and a nice shine.

 

Cary

 


  • Member since
    March 2003
  • From: Western North Carolina
Posted by Tojo72 on Sunday, September 4, 2022 11:43 AM

Thin it with Vallejo thinner and add their flow improver,has never failed me it's a very good acrylic clear.I have used all three matte,gloss and satin. Formula is 10-2-2

  • Member since
    May 2013
  • From: Indiana, USA
Posted by Greg on Sunday, September 4, 2022 11:43 AM

cwalker3
Needle size wasn't listed on the packaging but I figured a GP needle would spray a larger pattern so thats what I used.

I'd figure the same. Yes

cwalker3
The varnish sprays very slowly, acting like it's too thick. I guess the value of this is that it makes you apply light coats. What I ended up with was a very even coating and a nice shine.

That's useful feedback, thanks. And good to hear you had good results.

  • Member since
    August 2004
  • From: Forest Hill, Maryland
Posted by cwalker3 on Monday, September 5, 2022 9:47 AM

Tojo72

Thin it with Vallejo thinner and add their flow improver,has never failed me it's a very good acrylic clear.I have used all three matte,gloss and satin. Formula is 10-2-2

 

I thought aboubt using it but didn't. Nice to know for the future though. I do like the finish it gives and will be using it again. Thanks.

 

Cary

 


  • Member since
    August 2004
  • From: Forest Hill, Maryland
Posted by cwalker3 on Monday, September 5, 2022 9:51 AM

Greg

That's useful feedback, thanks. And good to hear you had good results.

Yes

Cary

 


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