For some trailers, you may change its base color.

몇몇 트레일러는 바탕색상을 바꿀 수 있습니다

I just ordered skin and paid.
Where Can I get my skin?

Once you've completed your order,  you could download your skin in your profile page right away.
https://x-skin.net/member/?mode=paypal 

How to apply downloaded skin

https://x-skin.net/community/info.html?query=view&uid=1261