Let the first coat dry and spray another coat on. Takes about an hour for it to dry and two light coats are better than one heavy one. Then use whatever colour paint you choose for the hull bottom. As everything is covered just fire away and I use Krylon again for this if they have the color I want. Michael's Craft Stores carry metallic paints as well.
Copper is another story and good luck finding it.
I get mine from Ace hardware stores. You have a varnished and paint model waiting only for the water line to be either painted or taped in place. I use model aircraft striping tape for this as it comes in all colours and it's a lot better than the automotive stuff. Do not allow any of the paint to touch the varnish as it will act as a solvent while it is wet. But by this stage you should be about done anyway.