Sorry for double-post, but I found something amazing.
There is a way to use skins without buying them, and no, im not talking about free lol rp.
There is a client-sided program called MK where you can select any skin for any champ you want and use that.
So whats the catch? The point is, that the program works client sided, as I said, no-one else will see the skin.
Only problem is that I don't know if riot is banning for this. I played a match with a lol friend and added him after it, he played veigar and said he was using the ultimate skin with some "MK" program. I decided to google it and here I am. He hasn't been banned, met him like a month ago when I added him and I saw him yesterday online.
Click here to download MK LoL(press "Download LoL" addon and it will lead you to a more official site)Use with caution. I don't know what is riot's opinion on this.