The trim assembles in sections, so start at the rear window and work your way around to the front. Once done, the clip-on pieces for the window gutters and windshield are next. Finish-trim the area right to the outside lip and reapply the chrome brightwork. Now do the edges of the windshield, again working the material into the lip and trimming with a razor so that the clips will hold the top. You're ready to go.