Yes, I read that article and others. I suspect I have bacterial pinking. The boat was left in a storage yard while I closed on my lake house 6 weeks later. The boat had the black full cover on securely, but it was in full sun and likely got very hot. Also, there was some rainwater intrusion which led to some moisture under the cover. The intense heat from the dark cover in contact with vinyl in some regions caused this. I hope it's not permanent, but it may be. Very unsightly.