As you probably know wet snow likes to stick/freeze to cold metal.
That said, lining the chute with a plastic liner is a great improvement.
OK, PAM, oil etc will offset that problem but only for a short while.
The answer IMHO is a plastic liner.
Mine has been lined for a fair while and I found it to be a great performer, very happy.
My first attempts were to use HD black stick tape and that proved my concept.
Also rusted bare metal will catch snow unlike any slick surface.
It is not for simple manufacturing economics that walk behinds now all use plastic chutes.