Retrieve the referenced path of an instanced Actor

[RattleSN4K3]

Actors are spawned into the World. These Actors are referenced by an absolute path.
This path could look like this:

vCTF-Sanstorm.TheWorld:PersistentLevel.MyActor_0

I know that the Outer of an Actor is the parent object who's holding that object. If I iterate over the Outers is see every value of the full path.

vCTF-Sanstorm
TheWorld
PersistentLevel

But how to figure out the delimiters. Is every Actor referenced in the same way? Is it safe, to assume a colon between TheWorld and PersistentLevel? Is PersistentLevel always there?

My current method to retrieve the full path is the following:

/** @return the full path of the Spawned Actor or the created object */
static final function string GetFullPath(Object O)
{
    local string ret;

    while (O != none)
    {
        ret = O.Name $ ret;
        if (O.Outer != none) ret = (O.Name == 'PersistentLevel' ? ":" : ".") $ ret;
        O = O.Outer;
    }
    return ret;
}

Does anyone know a better and secure method (and less hacky way) to retrieve this full path?

Are these paths valid?

vCTF-Sanstorm.TheWorld:PersistentLevel.MyActor_0
vCTF-Sanstorm.TheWorld:MyActor_0
vCTF-Sanstorm.TheWorld:AnyNameOfAStreamedLevel.MyActor_0

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Before you ask, I need to have a absolute reference to any object/actor to be able to use the FindObject() method.

local Object obj;

// For Actor or Object
obj = FindObject(fullname, class'Object);