Assuming you are removing the door liner and inner liner, lay the piece on a flat concrete floor and use a hammer from the inside to tap the dent flat.

Also, you should work in reverse of how the dent occured...start on the outside of the dent and work inward so to speak.

What is the best way to refinish the aluminum parts inside the cabinet?  the Dispensing wheel and all of the metal parts that look like they are oxidized?

Great, thread thought I would tag my body repair question on to this one as you have touched on many questions I had.

How do you remove a popped in section of the door. What I mean is, this is not so much a dent as it is a large section of the door is bent in slightly.  You know as if someone had put a hip check into it. 

Again, this is pretty slight and just by pushing from the back side of the door it pops back into shape.  Problem is, as soon as I remove pressure it pops right back.  How do I get it to stay popped out so to speak?

Thanks,
Steve

I am waiting to see how your machine is turning out. Keep us posted.

Thanks