Above is the page for the data Sheet for the paint. It gives 2 months at 23deg C so you should be ok.
International's yacht paint division is called yachtpaint.com.
I hope you have got a good marine electrician to do a connectivity test on all the underwater fittings and to go through all of your bonding wires. Its a black art and it needs to be right.
You are talking to a man who used both shaft brushes and shaft anodes.
Do you leave it permanently connected to shore power?