I am going to do a diy spray in liner that has the uv protectant, so no need to wax it or special up keep , so it should not turn grey.
and does not melt in 115 * temps as the herculiner rep told me it can get sticky but he said that was usually from installer error. that to me sounds like their pat answer, oh, you must not have prepped good enough, but to me melting and prep are 2 different things. otherwise I would do the herculiner and save 60 bucks