We took the back off of the hutch and added beaded board paneling from Home Depot that we custom cut. We didn't put it underneath the cabinet we used regular masonite for that.
This is how the cabinet fit on the buffet after we took that wooden "lip" that ran around the edges off. It was really easy for my husband to do. He found the screw holes and worked the screws loose then hammered it off where it was glued. I sanded it down smooth. You can still see the light unstained wood where the lip was coming out in front of the hutch. No worries. I was going to paint it anyway.
Painted the beaded board paneling raw umber and the cabinet Tuscan Red by Americana paint. The right side of the cabinet shows my first sanding with 3X to add distress.
I custom mixed a dark grey paint and then dry brushed it on. This piece has 4 "layers" of paint on it and I didn't photograph each one but here is how I did it. Base in Tuscan Red, dry brushed custom mixed dark grey, then black in a hatching pattern on top of grey. Last coat before the polycrylic was a thick wash of raw umber "stain." I just continued adding and covering up paint until I achieved the patina that I was looking for.
It looks like it ended up a sort of burgandy in this photo, but it didn't. I think it may be because I took the photo without natural light in the evening. I'll try to remember to re-post a daylight photo. It is really a gorgeous red with grey and black touches and then a light distress.