I first had the rocket built and held the ring in place and marked the ring supports on the ring I cut some tape strips and applied on the rings where the supports go. Then while wearing gloves and holding ring by the edges, I sprayed the insides. Since the ring supports are not preset the painting is easy. And helps prevent runs. I also put tape strips over the edges of the ring supports and pre-painted the tube and supports. I will do a final coat of paint to cover the fillets and issues where the tape strips were not perfectly aligned and a bit of bare tube shows. I may actually use a brush for the internal cleanup to avoid runs.