hey holiday i do custom painting at a auto body and did my hydro . i have had no problems . i used ppg products use ncp280 for primer and a 285 activator works great especially on flexible stuff like boats. i used whats called DBU basecoats its a reactive reduced with a drr1180 reducer then use dcd35 clear with du6 hardner do not get the accelerator for it it crystalizes the clear. trust me my boat shines like a babys butt and dont have 1 crack in it and i have hit 109mph on it