RE: Model Shipways 'Miss Adventure' 1:6 kit
Per the instructions, no mention is made of fiberglass. But if you want a worry free/leak free boat for years of operation, 'glass it.
A good primer on glassing mahogany models can be found [link=http://www.rcgroups.com/forums/showthread.php?t=329811]here[/link].
Pat Matthews