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Acrylic extender

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  • Member since
    August, 2015
  • From: Sidmouth, Devon, UK
Acrylic extender
Posted by Simon Newell on Monday, September 24, 2018 1:25 PM

Anybody recommend an extender to use with Tamiya bottled acrylic paint? Getting fed up with 'instant drying' and brush dragging.

What about with Humbrol acrylic spray paint? Getting fed up with it powdering on impact.

Simon Newell

Devon, England

  • Member since
    May, 2016
Posted by learmech on Monday, September 24, 2018 2:32 PM
Tamiya has a paint retarder for acrylics. It comes in the same size bottle as their thin liquid cement, but it has a light blue colored cap.
  • Member since
    May, 2018
  • From: Commonwealth of Virginia
Posted by VA Spartan on Monday, September 24, 2018 4:29 PM

I have used Tamiya’s acrylic retarder for brush painting.  It has done wonders for brushing it - no clumping, streaking, just smooth with great leveling.  I have a Fairy Swordfish awaiting paint so I might forgo the airbrush on this and go with the brush and Tamiya acrylic to see just how good I can get it going “old school”.

On the workbench: 1/35 Takom T-54B; 1/35 Tamiya Char B1bis w/French Infantry; 1/48 Tamiya Fairey Swordfish Mk. 1

  • Member since
    November, 2008
  • From: Far Northern CA
Posted by mrmike on Monday, September 24, 2018 4:46 PM

Have yet to try the Tamiya product, but I have used Future (now sold as Pledge Multi Surface Floor Polish if I remember the name right). It really slows down the dry time and gives the paint a semigloss finish. Sometimes that's useful.

There was another thread about this where someone was using a Grumbacher acrylic retarder to help with brush painting, maybe worth looking into if the Tamiya isn't available.

  • Member since
    January, 2017
  • From: Colorado Springs
Posted by mawright20 on Monday, September 24, 2018 8:51 PM
I had never thought of using retarder for brushing, or with acrylics.
  • Member since
    August, 2015
  • From: Sidmouth, Devon, UK
Posted by Simon Newell on Tuesday, September 25, 2018 3:37 AM

Thanks for all the replies; if I had a Homer Simpson 'doh' emoji I'd be using it now. How stupid am I not to research Tamiya's own products? I should have known of course. Still, always good to hear people's opinions.

On the subject of Humbrol acrylics, I've found a product called VMS SlowMo airbrush extender which is claimed to be Humbrol compatible. Has anyone used it?

Simon Newell

Devon, England

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