This is how I skin out a Red eared slider. It's different from doing a snapper in a few ways. I'm sure others do it different, but I like doing it this way because by leaving the front part attached, I get a cleaner more natural look to the neck and shoulder areas (IMO)
Here you can see where I used a dremel and a cutoff wheel to cut the bottom of the shell.

Open it like you would a car hood

and clean everything out. I like to call it "the soup"


Skin out the tail and back legs first, then tube out the front legs, and neck


Use Borax to help with cleaning it out. I use a fish cheaker tool to do the scraping.
Make sure you clean the meat out of the spinal column. There's quite a bit in there. I use pliers and brake the spine to get to it.

As you can see there's quite a bit in there. This is just from one little area.
