use is the main thing. just sitting allows thing to attach themselves.
I am putting my boat in this Friday-Monday and was wondering will my hull be OK with no paint. I read somewhere if you keep it in the water more than a few days it can foul your bottom.
This is in the Upper Chesapeake BTW
Looking at your picture in your posts, what do you mean by "no paint". Is this a fiberglass hull with the gel coat sanded off. If so I would recommend not putting the boat in as the fiberglass will absorb moisture making the refinishing job a far harder task.
Rick