Where I have a concern is that you then believe that you could execute a IFR approach in cloud.
SoCal
That depends on a number of factors one concerning the aircraft type and autopilot fitted to it as well as how far he takes his unnoficial training.
He could for instance model the IMCr in his unnoficial training?
As an unqualified for IMC flight pilot it is more likely that the pilot would be radar vectored to a safe cloud break point.
If the cloudbase was too low an SRA or even a PAR.
Vectors onto an ILS with an autopilot fitted with app mode should hold the localiser and glide giving him speed control only to deal with.
So I would adjust your comments to depending on his training and the aircraft
But its that scenario I think he wants to cover.
Pace