I'm in the process of restoring the 40 hard top. Got the fiberglass cap off, rain gutter and rivets removed. My question is reinforcing the edge of the cap. Looks to me like the OEM was a single layer fiberglass cloth with resin on the bottom of the cap. Am I missing something here? Is the purpose of this is to give rivets something better to hold to once installed? Is there a better way to reinforce this?