Its a multi-step process, but you can get the canopy clear. You can get wet or dry sandpaper at auto parts stores in very fine grits, 800, 1000, 1200, 1500. Use progressively finer papers to sand the seam. Last step is to polish the sanded area with an abrasive metal polish like Blue Magic, Flitz or Mothers Mag and Aluminum polish. That will get the canopy almost clear, then the Future dip will finish it off nicely