No. The only way to make a scratch go away is to buff it out. If its a deep scratch you may have to get more aggressive and draw file it out. The only thing cold blue, or hot blue for that matter, will do is blue the metal laid bare by the scratch. That in turn makes it obvious that someone covered up a scratch with blue.
Go tell the Spartans,Travelers passing by,That here,Obedient to their laws we lie.
I'm older now but I'm still runnin' against the wind
| 
