Here's a visual aid for explaining what I'm trying to understand.
I've got a trench coat which has been sculpted solid because I would like a thickness to the bottom and such.
Naturally some faces will be unnecessary and need to be deleted at some point, like in the back where the body of course covers it and inside the sleeves. (Shown deleted in the picture)
Is it a bad idea to delete those now? I'm going to be baking in Substance. How exactly does the UVing process work here?