The toilet bowl did need an extra thin layer of carbon to cover the front and the seams on the top. I first glued a PVC tube on the underside of the front panel to get a nice round edge and maybe I put a curtain on it. I made a front panel for the water bowl from scrap pieces of foam glued together with PU construction glue. I first glued it to the top and when it was dry I laminated it also to the top, the front has still be done. I gave the air tube for the holding tank also a layer carbon so it can be laminated in place the next time. I put a ridge of foam and carbon for the water bowl in place so it can be later glued on top of it, there is hardly place to laminated under their later.