The first seat tank?

[Aerofoam]

Most composites should be kept away from the extra heat from a dark finish, some fail completely.
I don't know the specs for the UV cured resin, it's probably similar to the material first used in dentistry....
A lesson can be learned from the old stick and cloth airplanes for UV protection. Paint a first thin coat of aluminum paint as a reflective base, then paint the final color over it.
I would double check the resin heat specs before painting it black, I think that is a problem. Most composite aircraft are painted white for a reason.

 

[WaspAir]

Here's all I can contribute:

Nobody, and I really mean  nobody, puts black on composite sailplanes, full of carbon fibre these days. Colors other than white are only used for tiny markings such as registration numbers or a splash of color on nose, divebrakes, or wingtips for visibility. Manufacturers explicitly forbid colors in the manuals and the airworthiness and approved repair methods documents. If you ever see a glider with colorful paint, it is an old metal- or tube & fabric-construction bird.

 

[Aerofoam]

This is some research I arrived at after following these guidelines based on this article. I was the skeptic first.
Not so much anymore. My two bro's from McDill AFB hooked me up with the paint.
They were aircraft mechanics and my motorcycle racing buddies! The paint was not forbidden to use so my friend gave me the formula.
Emron deep black is the closest commercial formula. A lil scotch bright pad gives it a satin look.

John Randolph Says You Can Paint Composite Birds Dark Colors | Aero-News Network

| Published: Tue, Jul 30, 2002 | Aero-News Network

www.aero-news.net

I would not use any dark colors unless the resin was rated above 300F to have a safety margin.
There are very high temp epoxies, but they are expensive and the foam core can only take so much heat before breaking down quickly.
The glass, or carbon doesn't care, but the resins do.
The best heat reflective coatings are made with barium sulfate, which has the highest reflectivity AND the highest emissivity.
They appear white and actually can render the surface lower than ambient temperature.

 

[Aerofoam]

OK. For the critics of critical temperature due to dark paint. Tested in the real world, morning sunlight from 9am to 12:00 noon and 3 pm mid day sunlight temps taken. lowest temp was ~100f to a highest of 123f. 118f was about average. I am not concerned about heat absorption or surface temps in full sunlight. The base coat was white primer and the paint is reflective enough to not get any where near 158f "heat distortion temperatures." At least now I know for sure since testing the temps, and that's a positive. And the carbon fiber one see's is a wrap. It's for aesthetics. Hope this helps clarify the concerns expressed.

In Arizona in July I have seen surface temps from 116F to 136F on 2 white cars from the same MFG.
So white paint can vary. The undercoat is important, but I have measured temps over 160F with black paint.
When I was first building my off grid facility, I would cook pizzas in a black 20mm ammo box on the S side of the building.
They came out steaming in 20 minutes.
Even if it doesn't immediately break down the material, heating at over 140F will rapidly age synthetic materials and AL.

 

[Aerofoam]

What is the core material?
BTW UV cured does not mean it is resistant to UV, if anything the UV may age it much faster.
If it is only in the sun while flying, the airflow will definitely be a saving grace, but as soon as you park it.......

 

[Aerofoam]

I can show you a lot of black cars in Arizona,but it doesn't mean it's a smart thing to do!