We keep our boat up the New River in Fort Lauderdale. Water is salt/brackish. I originally used Petit Trinidad SR hard paint, and it started flaking after only a year. Could have been a crappy application. Also noticed a lot of slime/green stuff at the waterline with the hard epoxy Trinidad SR.
We've now switched to West Marine Gold with Irgarol. Works great so far after 14 months in the water. We'll see at haulout how it looks in February. A lot less slime at waterline.