So this is wierd. Summerized and cleaned my 2007 GTX 4-tecs. I noticed on the lower part of the footwell, just above well, for about 18", these small dimples on the surface, like bubbles. Try to push them out they dont move. Has the Gel coat been compromised? I never use hard chemicals to clean the hull. It is worse on one machine than the other. Nothing on the right side edge of the footwells on either machine. Jim