 So, you don't Unweld, not a problem. Unweld lets you left click a polygroup island and separate it from the rest of the topology. Once you've separated it, you can hold Ctrl and Shift and left click to see what it looks like by itself. If you change target to single face, you can do this one face at a time. Hope that helps and as always I hope you have a fantastic day and I'll see you around.