I always have an ongoing mental struggle with my art on if I should leave the damned sketch lines or not. I usually do because I like the added texture, because I kinda hate having all my first stage work be completely wiped away, and it just… seems unfinished somehow without them?  I generally erase them out in prominent focus areas, and keep them for areas that don’t need as much clarity. It might be weird, but I’ll probably keep doing it. 🙂