Military paintjobs matte for airshow also? Combat aircraft are painted in a matte paint to prevent them from reflecting moon/sunlight too much.

But what about liveries used for airshows? Those colorful paintjobs, are they also always matte, or are they sometimes painted in more shiny paint.
Matte paint creates drag and reduces the top speed. The sheen of the paint is often adjusted to suit operational conditions. For example during WWII an aircraft being prepared for a special high-speed mission, such as a dangerous reconnaissance flight, might have its matte camouflage waxed over to give it that edge of speed. Many combat jets have routinely been finished in a semi-gloss, as a compromise between the two. Special schemes for airshows do tend to be high gloss.