I have tried the idea presented here of using fish tank tubing inside the trunk gasket with poor results. The tubing was both too small a diameter and too soft. My next approach seems to be working well. I replaced the clear 3/16" OD fish tank tubing with 5/16" OD tubing from the hardware store. The 5/16 tubing has much thicker walls and seems to be able to do the job. I was not able to push it around the corners, so I made a slit in the casket in the middle of the rear portion, and pushed it in from that center point, to where the corner started and it would go no further. From the center of the gasket at the rear, I was able to push a piece of tubing 11.5" long to both the left and right, for a combined distance of 23" across the rear. The fish tank tubing remains in the front of the gasket for now. It appears the larger and harder plastic tubing is doing the job. The trunk lid does have a rack, but nothing has ever been carried on it, and still the paint on the sides of the lid and base has taken a beating.