If your inner cap is out, the super majority of that can roll out if you're careful and take your time, and of course have the right tool. Get in touch with Aerowood on here. He makes a nice aluminum roller that will help you carefully work that dent out. It'll never be perfect, but I was able to roll dents far worse, with deep creases out of a shell that actually blew off the frame in a wind storm (by previous owner) during a shell off and tumbled down the road. very careful rolling from inside and outside with some heat (a heat gun helps) and hours of work it'll be hardly visible.
Scott & Megan
VAC LIBRARIAN WBCCI 8671
1963 Safari from the 1963-64 Around the World Caravan