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Bubbles and Chalk Washes

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  • Member since
    November, 2018
Bubbles and Chalk Washes
Posted by MCTHEPROMODLER43 on Tuesday, November 06, 2018 10:35 AM

Hi there, I had just recently applied a white chalk wash to the deck of my USS Missouri, and it happens to actually look good! Only thing is, immediately after it was applied, bubbles were created, and when the wash dried, there was a weird finish. It was as if the shape of the bubbles was put onto the warship's deck, and the chalk surrounded it. After this, I had to wipe a lot of the dried wash off, so that it only stayed in the details. The chalk wash was just three drops of dish soap, water, and white chalk. Does anybody have any advice on this?

  • Member since
    January, 2014
Posted by Silver on Wednesday, November 07, 2018 3:01 PM

Bubbles show up when -if applied by brush can cause bubbles if going to fast by stroke with a brush in the same direction.Go slow and if any bubbles appear.Poke them with a thin new brush.Common artist do that to their paintings whe bubbles appear with their paints.99.9% of acrylic paints do that.Enamel washes are rare with bubbles.

  • Member since
    January, 2014
Posted by Silver on Wednesday, November 07, 2018 3:07 PM

Not a big problem , just more work.Also typical with sludge washes bubbles.Some modelers often use a bit of dish washing soap in their wash.It creates bubbles.

  • Member since
    March, 2014
Posted by BarrettDuke on Wednesday, November 07, 2018 3:26 PM

Hey, McT, Sounds like an interesting application. I can understand how the dish soap would foam up with even the slightest amount of agitation as you brushed the solution across the surface and hit indentations or raised places, and that's exactly what would happen if you did get the bubbles. The surface tension of the bubbles pushed your chalk wash away. Then when the bubbles popped, you got those circles. I saw online that someone recommended white vinegar as an anti-foaming agent, but it might be too harsh for your other finishes. I don't know that this would work, but maybe try adding some defoaming agent to the wash next time, like what people add to carpet shampooers to prevent sudsing. Probably wouldn't take much. I'd test it on something first. :-) Barrett

  • Member since
    November, 2008
  • From: Central Florida
Posted by plasticjunkie on Friday, November 09, 2018 4:26 PM

You may have added too much soap. Only a drop or two will do.

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  • Member since
    November, 2018
Posted by MCTHEPROMODLER43 on Sunday, November 11, 2018 10:57 PM

thanks, everybody for their feedback! I'm new to the form, so it is surprising to have so much support from our common modeling community!

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