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Sand-Cast finish

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  • Member since
    January 2012
Sand-Cast finish
Posted by Blixa on Friday, January 20, 2012 5:59 PM

I have created 1:6 master's of an engine that was originally sand-cast. Before they are completed in resin I would like some hints on how to replicate the associated "grainy'' finish of parts such cast.

  • Member since
    September 2011
  • From: Medford, OR
Posted by OMCUSNR on Friday, January 20, 2012 9:03 PM

Might try airbrushing with "dry" paint.  Try to get the paint a little thick, spray with high pressure (about 40psi) & move away from the part.  If the paint is drying before it hits the surface, it tends to look powdery & grainy.  It also tends to rub off, so you might need to be careful how you handle the master.

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  • Member since
    April 2004
  • From: UK
Posted by Jon_a_its on Saturday, January 21, 2012 5:20 AM

Mr Surfacer 500, & stipple on.

I have used thick enamel, mixed with talc, but this gives a texture more like 'seude' , so you could experiment with fine sand, talc, etc,

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  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Saturday, January 21, 2012 10:00 AM

As an old timer, I modeled in the days before flat paints were available.  We used to add talcum powder to get a flat finish.  This was hand brushing, however. I don't know if talcumed paint can be airbrushed. If you used very much talcum, the finish was rough and pebbly.

 

Don Stauffer in Minnesota

  • Member since
    September 2011
  • From: Medford, OR
Posted by OMCUSNR on Saturday, January 21, 2012 10:04 AM

Bet you could do it with a VL & the 5 tip.

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  • Member since
    March 2003
  • From: Illinois
Posted by wjbwjb29 on Thursday, February 9, 2012 7:52 AM

Don what year was that , that there was no flat paint available.

 

Bill

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  • Member since
    November 2009
  • From: Twin Cities of Minnesota
Posted by Don Stauffer on Thursday, February 9, 2012 8:46 AM

wjbwjb29

Don what year was that , that there was no flat paint available.

 

Bill

Forties and early Fifties.

Don Stauffer in Minnesota

  • Member since
    March 2003
  • From: Illinois
Posted by wjbwjb29 on Thursday, February 9, 2012 12:18 PM

In the early sixties flat black and silver were my favorite colors to brush paint, you couldnt get it wrong. They dryed fast and looked good, I had never heard of talcum powder in paint before.

Thanks for the nostalgia.

Bill

On the Bench:   Trumperter Tsesarevich on deck Glencoe USS Oregon

  • Member since
    June 2010
  • From: Austin, TX
Posted by DoogsATX on Thursday, February 9, 2012 12:26 PM

You could use Rustoleum textured spray paint. I've used it for no-slip walkways to great effect. Better sand-grain than stippling Mr Surfacer and more durable than intentionally "dusting" paint.  

 

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  • Member since
    March 2003
  • From: Illinois
Posted by wjbwjb29 on Thursday, February 9, 2012 2:23 PM

Doogs how long did it take to dry, Rustolium is notorius for long drying times

 

Bill

On the Bench:   Trumperter Tsesarevich on deck Glencoe USS Oregon

  • Member since
    June 2010
  • From: Austin, TX
Posted by DoogsATX on Thursday, February 9, 2012 2:36 PM

wjbwjb29

Doogs how long did it take to dry, Rustolium is notorius for long drying times

Bill

30 minutes? I sprayed and unmasked pretty much right away. Then left it to dry overnight. I only did a light application, but honestly that's probably all that'd be needed, especially if the goal is texture, and it'll be getting color on top.

On the Bench: 1/32 Trumpeter P-47 | 1/32 Hasegawa Bf 109G | 1/144 Eduard MiG-21MF x2

On Deck:  1/350 HMS Dreadnought

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  • Member since
    March 2003
  • From: Illinois
Posted by wjbwjb29 on Thursday, February 9, 2012 6:50 PM

Thanks gotta try that

 

Bill

On the Bench:   Trumperter Tsesarevich on deck Glencoe USS Oregon

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