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 Post subject: Flat Urethane Top Coat
PostPosted: Sat Oct 17, 2015 8:15 pm 
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The full flat Acrylic Urethane looks really nice and when fully cured is dead flat. It is somewhat difficult to shoot as it is flashing off behind you and looks like dry spots. The paint when wet has some gloss which rapidly disappears as it is curing. I am very happy with this paint and it is almost a dead match for the USAF Coin Gray. I included some closeups to show how soft and flat the paint looks.

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PostPosted: Sat Oct 17, 2015 8:32 pm 
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OOPS! I meant to post in the T-41B restoration thread but I screwed up, am pretty tired, nine hr day painting. Mod please move for me thank you.

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PostPosted: Sun Oct 18, 2015 12:52 pm 
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Looks Very nice!! What brand of paint are you using?
Love what your doing with the airplane.


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PostPosted: Mon Oct 19, 2015 7:07 am 
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t6flier wrote:
Looks Very nice!! What brand of paint are you using?
Love what your doing with the airplane.


We went with full flat acrylic urethane from Summit Racing. Over the years I have tried Air Tech, Imron, Aerothane, PPG, among others and an assortment of flattening agents including powders and clear liquid provided by the paint manufacturers. The only one that even came close to looking right was Poly Fiber Aerothane using their ground powdered silica.

All of them are difficult to shoot and are very sensitive to film thickness, color change depending on the amount of flattening agent, type of speed of activator temperature of paint booth, humidity and finally Moon Phase :)

This Summit Racing paint is very good and comes already flat out of the can so no additional mixing of flattening agent is required, However it is still plagued by the same issues all flat paints have that are listed above. It is much easier to simply shoot a satin, gloss or high gloss finish than struggle with trying to achieve a realistic flat finish the same as the old enamels and lacquers that readily flattened and went on uniform and were very easy to shoot.

The finish finally came out good but I recommend the paint with caution as spraying a full flat finish is not for the faint of heart. We had a temperature change late on day two that resulted in some areas turning satin that had to be resprayed.

All in all I believe it was worth the trouble and I now have the flat "weathered" in Country look I wanted. Most paint shops will run away when you start talking to them about doing a flat (not satin) finish.

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