Decal gloss coat failures again

This is Tamiya acrylic gloss clear over two decal spots. On a test piece Revell enamel clear did the same thing. It’s over Testors rattle can OD. For the life of me I don’t understand how both clear as glass gloss coats can actually darken a color but I’ve resprayed and will go from there. If anyone has any ideas I would love to learn

I may apply the rest of the decals over the bare flat OD. The really nice thing I noticed in this decal set from ICM is that there is about zero superfluous clear backing extending beyond the decal edges. That was the spot that most showed up whenever I applied over an unglossed surface.

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The problem seems to me that you’re spot painting the clear coat where you want the decals. I usually do that too, with no issues. But if for whatever reason it’s changing the color, why not just shoot the whole model with clear?
The other thing you could do - shoot random spots of clear all over the model. Most of the birds I’ve ever seen have a very splotchy appearance. It would enhance your build. Unless you take it to a competition. The judges would excoriate it.

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I do not have an air brush but have tried that with rattle cans and I was never able to get a gloss surface even after several coats. You may have a point about that splotch effect if I were to apply more random and feather it out. Hmmm

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I don’t think it is actually darkening the color. It is all about the sheen and light reflectivity. The dull paint doesn’t reflect as much color/light as a glossier surface.

With a matte finish, the color/light bounces in all different directions. With gloss coats, the color/light bounces away more evenly therefore giving more color/light to the viewer.

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I did a test piece and saw the same color change even after I went over it with dull coat. Yes it is less noticeable under certain light conditions.

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Which brand are you using? Possible to try other brands to see if the effect is minimized?

Personally, I use Vallejo semi gloss and matte clearcoat.

My example:

This is my Tamiya M51 SHerman, painted in Sinai Sand mix, using Tamiya XF Acrylics; pretty flat and light…

Then i hit the entire kit (not just the areas where decals would go), with Vallejo Satin clear coat.

Then the finished build, added Vallejo matte clearcoat after the decals were applied.

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Pretty sure this has happened to me before with acryl model master CC. After I finished it off with matt or whatever , the spot was unnoticeable. I was probably using tamiya acrylic underneath. Now inkretry much use future gloss floor coat to base and seal decals.

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