Change your weapon skin in World of warcraft

First of all, Head to:
www.Wowhead.com

After it open your WoW client and find out, What is your weapon called.
Now, Put the name of that weapon your using to www.Wowhead.com search.
Example ; Battleworn Claymore.
In your address bar, You will see the weapon ID number. Copy it!
Example ; http://www.wowhead.com/?item=23346
Item number currently 23346.

Open Cheat Engine.
Go to Process List, Look for Wow.exe.
( You will have to keep your WoW client open while doing this. )
Click OK.
Put your weapon ID number into Search bar, Press First Scan.( Next to Hex )
Example ; 23346
Now, Right click first, Click Select all items.
Then Click Red arrow, Called " Copy all selected items to the address list "
After that, Freeze all of them.
Now go back to www.Wowhead.com, And search for weapon that skin you want.
Example ; Most famous is Grand Marshal's Claymore.
Copy that weapon ID number.
Then open your Cheat Engine, CTRL + Click Value bar and
put there that weapon ID number wich you picked from www.Wowhead.com.
NOTICE ; There will pop up Value box where stands : Change these values to : [ ID NUMBER ]
Now open your WoW and you should have the skin of that weapon you picked.

THIS WONT EFFECT TO YOUR DAMAGE, ONLY FOR LOOK. ( Including Armor stats wont effect. )

Just for sure ; Blizzard fixed this, But you can do it in World of warcraft private servers.

Post if any problems

Happy CE Hacking!