I have a 48" and a 24" counter top. I have a 36" sink base with a 12" base, I wanted to use a double basin sink but I couldn't find one that would work for a price I was willing to pay. So I ended up with a single basin that is 22" by 25".
I used off the self spray paint. I did route the edges but it took me a couple of coats of paint before I realized that I needed to seal the edges. I thought MDF finished smoother. Anyway, after some internet research, I used rock hard putty to seal the edges and then sanded them smooth.
You won't get any yelling from me. This is an older refrigerator, probably 8 to 10+ years old, that I got for free when my office relocated and upgraded. It definitely has the coils in the back, you can't see it very well in the picture from the last post. Here's a better shot.
This picture also shows that there is about 9" of air space behind the unit.
Your advice is good and people need to be mindful of such issues. I felt pretty sure I could screw into the refrigerator cabinet with this refrigerator but just to be certain I consulted someone that I know is a HVAC expert. When I eventually have to replace this refrigerator with a newer one, I would probably also go the ratchet strap route. I research that method for this install but chose the mechanically attached bracket way because it was the cheaper option (in this instance).