I came across (drove past a pile of trash and this was in it) an 80" limo cart top that that is in good shape other than a few cracks. I would like to repair it but I'm not sure of what to use on it because I don't know what it is made of. I has the same design as the one on my Marathon and think that it is plastic. I would like to coat the top and bottom with something to reinforce it against further cracks. Anyone ever do this? any input is appreciated. Thanks Jim