The following link is to a nicely painted sequest in CultTVman's Sci-Fi site. He xplains how he did it and it has a link to his e-mail if you'd like ask any questions on his techinque.
http://www.culttvman.com/paul_hemme_s_seaquest.html
Actually, under the Sci-Fi TV heading there, you can see several Seaquests under the heading 'Seaquest DSV'