Quote Originally Posted by mikenehrkorn View Post
Now you guys have me interested........as I said I've been doing this for many years and never had any blistering before but now you have me worried

What causes the blistering? Does it happen to have anything to do with the temperature of the water (all of our boating is in MI where water temps never get very high) or some sort of factor of the water's acidic factor or just that its "wet"? Or maybe it has something to do with darker colors that might attract more sunlight??

Inquiry minds (me) want to know.....
I had a white hull on the boat that blistered so the darker color had nothing to do with it, I actually did a lot of research and never really found out what specifically causes it from a resin / color / water perspective. I do know that its water that gets absorbed into the gel coat and gets trapped between the gel coat and fiberglass. It literally looks like your boat has blisters all over the bottom. The boat I had that did this was a monterey (before seeing the inboard light) and I don't know if the materials used are inferior but I do know that monterey makes a good boat for an IO.

If your going to leave the boat in the water you should seal the hull and paint it with defouling (?) paint. This is a process that needs to be redone at a specific duration.

I absolutely refuse to paint that crap on the bottom of my baby so I choose to go dry storage and make that phone call. Just my experience though.