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Thinning Tamiya paint

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  • Member since
    January 2017
Thinning Tamiya paint
Posted by Calmo2 on Tuesday, August 15, 2017 2:10 PM

Hello; I was finishing painting my 1953 Ford F-100 body parts and after I was done I noticed that I had forgot the rear fenders!!!! I knew I was running short on paint and I got two coats on with a 2 to 1mix (2 parts paint and 1 part thiiner) and new I didn't have enough paint for the final coat so I tried thinning the rest of the paint so I think I was down to about 1 to 1 and manage to get the last coat on. Then I noticed that the fenders were quite a bit more shiney than the rest of the parts. Can I thin the last coat from now on to about 1 to 1 for a nicer shine or do I run the risk of loosenig up the first two or three coats. There doesn't seem to be any thing wrong with the fenders I just painted this way! I just started using a airbrush and was wondering if thinning like this for the last coat is something other people do? Any advice would be appreciated. Thanks George.

  • Member since
    August 2017
Posted by japan617 on Tuesday, August 15, 2017 4:15 PM

Tamiya acrylics have a tendancy to lift if you try and recoat while brushpainting.

You won't have any issues with lifting while airbrushing but if the paint is too thin, it will be runny, cover poorly, and the paint might spider. 

  • Member since
    December 2003
  • From: Nova Scotia
Posted by Bainford on Tuesday, August 15, 2017 8:26 PM

I agree with japan617. A 1:1 mix ratio is not unreasonable, too.

Many (most?) modellers develope little tricks or techniques that work for them, often discovering them the same way you did, by chance. If it works for you, then go for it. However, keep in mind that there are many other factors that could also affect the shine on the second go (pressure, distance, temp, humidity, speed, etc.). A little experimentation with mix ratios is worth while, though. 

"It would be unusual, if the unusual didn't occur."

- Steamboat Gariepy


  • Member since
    January 2017
Posted by Calmo2 on Wednesday, August 16, 2017 10:30 AM

Thanks guys. Hello Trevor; When I did the fenders it was only about a 1/2 hour after I had sprayed the first parts so everything was the same. After I thinned the last coat I noticed that the fenders was quite a bit shinier ( if that is a word). I think I am going to experiment a little with plastic spoons and see what happens when I get down to a 1 to 1 mix for a last coat. Thanks again guys.


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