I made a foam plug that fit into the vehicle and then installed the hoops onto the foam. I covered the plug with 2 part epoxy (magic Sculpt) rolled very thin. Once the putty began to set up I could manipulate it easily to add details. When it was all cured I removed the plug and refined the edges then added the open area with more thin putty, straps are either Tamiya tape and or thin lead foil.
Good luck with which ever direction you choose.
2 Likes