The last 2 boat i've purchased have spent some time in FL, the current one, an 09 infusion spent about 8 months on the beach in Pensacola.
This is the 2nd boat that has developed vertical streaks down the hull. On my 04 N20 I attributed it to oxidation, but on a 1.5 year old infusion? I wax the boat 3-4 times a year.
I've come to the conclusion that it has something to do with both boats coming from FL.. any ideas? I've never had this issuue on previous boats nor seen it on any other boats here.