I just pulled hull number 56 out of the water for a bottom paint
and discovered lots of small holes or voids in the original primer coat.
I'm not really sure what could have caused this. I did have a diver clean the bottom recently, I hadn't been able to get out to the boat for several months and to my shame there was a lot of barnacle growth (those critters seem to grow mighty fast here) so I wonder if the primer coat popped off when he was cleaning
them off the hull, seems unlikely but it's the only thing I could think of.
Now I'm wondering whether to apply another primer coat or just fill the holes and put a couple of coats of anti-fouling paint
on. I've read of some osmosis
issues on boats without the primer coat so I'm concerned just covering the holes could lead to trouble down the road.
It looks like the original primer is not available in the US, Boero Delta
2000, so do I pull off the original primer coat (sounds expensive) or will a new primer coat bond to the old one ok, should I be worried about this, has anyone else put new primer on top of an older coat?