It could be the chemicals and dirt coming off from not washing it. I used woolite on the four winns canvas and the fabric was like brand new when we sold it. The other thing you could try is bringing it to a canvas shop to ask them what you could do. A couple places I have used have been very helpful. Seeing it in person will also help.
_________________ --2002 3880 Regal Flybridge | Twin Merc 8.1HO **Seven** --2003 AB 13 VST Console Inflatable | Tohatsu 40hp TLDI **Phish'n ski** --310 Mercury Inflatable | 1982 9.9 Johnson
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