Looking great I bet...need more pix!
If I may interject something here....At some point you will need to use a longer flat sanding block. Working with the long side parallel to body length and work in a "X" sanding pattern. That is how you get it FLAT. The DA is just to strip old paint...you can not get a flat surface with a DA.
Smooth does not mean flat.
If this is old news then I apologize for being "captain obvious".
