これ読むと迷彩は戦績1位の時の追加報酬からしか出ないみたいね
マーケットが使えれば迷彩売って部品購入できたりしたんだろうけど

Extra rewards for the top performing players
The more efficient players will be able to assemble their vehicles 80% faster
(it’s an average for all War Thunder game modes, including trading spare Aircraft Maintenance Technician Toolkits on the Market and purchasing new components for the GaijinCoins you received)!
You will need to meet some further requirements: be the first in the team at the end of a battle and you will receive an extra trophy that contains between one and three, and in rare cases - 10 Aircraft Maintenance Technician Toolkits.
Occasionally you will be able to receive a coupon for a unique camo for one of the Special’s vehicles. You can either activate it or trade it on the Market.