PlayerPrefs Question

I'm trying to build a message box and am using PlayerPrefs to save new messages and reload them after the app is closed and reopened. However i've ended up having the namefield load up rather than the message. I've taken a closer look and can see why this has happened and it seems I need to change the variable from nameField to something like messagesTyped.

The problem is the messagesTyped variable I currently have won't work with the SetString and GetString commands. I was wondering if anyone has any suggestions for how I can make this work. Should I create a new variable to signal the messages submitted with the submit button and use that with the PlayerPrefs?

Here's the code as it is at the moment:

 var stringToEdit: String = "What's The News?";
 var customSkin: GUISkin;
 var maxMessage = 10;
 var messagesTyped: String[];
 var messageSpacing: float = 10;
 var maxChar : int = 30;
 var scrollPosition : Vector2 = Vector2.zero;
 var messageAlert : String = "New Message From ";
 var nameField: String = "Name";
 private var msgCounter: int;
 
 
 function Start(){
     maxMessage--;
     messagesTyped = new String[maxMessage];
     GetMessages();
 }
 
 function GetMessages(){
 if (PlayerPrefs.HasKey(nameField) == true)
 {
 nameField = PlayerPrefs.GetString("Name");
 print("loaded"+nameField);
 }
 }
 
 function OnGUI(){
     GUI.skin = customSkin;  
     stringToEdit = GUI.TextField(Rect(270, 100, 450, 80), stringToEdit, maxChar);
     nameField = GUI.TextField(Rect(80, 100, 180, 30), nameField, maxChar);
     if (GUI.Button(Rect(730, 100, 60, 30), "Submit"))
     {
         SubmitMsg( messageAlert + nameField + ":  " + stringToEdit);
         SaveString();
     }
     var x: float = 270;
     var y: float = 180;
     for (var i: int;
     i < messagesTyped.length;
     i++)
     {
         y += messageSpacing;
         //print("Here");
         GUI.Label(Rect(x, y, 500, 60), messagesTyped[i]);
     }
     }
 
 function SubmitMsg(submittedMsg: String){
     if (msgCounter == maxMessage)
     {
         msgCounter = 0;
     }
     messagesTyped[msgCounter] = submittedMsg;
     print(messagesTyped[0]);
     msgCounter++;
 }
 
 function SaveString(){
 PlayerPrefs.SetString("Name",nameField);
 print("saved"+nameField);
 }