G'day Alex "Perfection by International" is an extremely hardwearing paint that can only be put on by roller and brush tipping, wearing a respirator. If your paint is basically okay and its only where your hulls make contact with the sand consider taping that area off apply a bit of wessystem with microfibres to repair damage and just paint that area with any single pack marine undercoat and paint. You can do that yourself very easily and twice a season if needed. With single pack the opened can won't go off as quick.
regards