I'm not going to get into an argument with searat12, but I'll offer this observation. Gloss has scale - because the light sources that make the observer aware of it don't. Veteran ship modelers generally lean away from glossy paints because the highlights and reflections they produce can destroy the "scale effect," especially on small scales. The smaller the scale, the more unrealistic a gloss finish is likely to look. Donald McNarry, who works in extremely small scales (and who, if I believed in bestowing such titles, I would unhesitatingly label the best ship modeler whose work I've ever seen), emphatically asserts that he always uses flat paints - even on such vessels as yachts and ocean liners.
But he's talking about models on scales like 1/600 and 1/192. The grand old "builders' models" of late-nineteenth- and early-twentieth-century steamships almost invariably were painted with glossy paints (partly, it must be acknowledged, because good flat paints were rare in those days), and most modern observers would, I think, agree that they look fine. A fifteen-foot-long model of a spit-and-polish ocean liner would look weird if its hull and superstructure weren't shiny.
Some time back I built a model of a late-nineteenth-century pilot schooner. Those little ships were well maintained; photos make it clear that they frequently had very nice, shiny paintwork. I initially painted my little model of the Phantom (1/96 scale) with flat acrylic, but I concluded that the hull just didn't look right. As an experiment, I gave the flat paint a coat of Renaissance Wax. (Renaissance Wax is a high-quality "microcrystaline" product routinely used in museums to protect artifacts. It isn't cheap, but it's good: http://www.woodcraft.com/product.aspx?ProductID=08G22&FamilyID=3235 . Here's a cheaper version that - though I haven't tried it - I suspect would work fine: http://www.leevalley.com/wood/page.aspx?c=2&p=20090&cat=1,190,42950&ap=1 .) I just rubbed a little bit of the wax on the painted surface - which I'd let dry for several weeks - with a soft cloth. I'm pretty happy with the result, which I think is visible in a couple of these photos: http://www.hmsvictoryscalemodels.be/JohnTilleyPhantom/index.html .
Another approach is to use flat paint and coat it with a gloss or semi-gloss finish of some sort. Testor's makes a nice semi-gloss clear laquer for the purpose, and any decent paint store can provide quite a variety of such substances. (Always, of course, test the finish on a sample of the paint you're using before you risk it on the model.) Yet another trick: get a bottle of gloss black and one of flat black, and mix them. By varying the proportions you can get any degree of gloss you want.
My suggestion is to vary the amount of gloss according to the scale. But it's your model; what's most important is that you're satisfied with it. There are, thank goodness, no "rights" and "wrongs" when it comes to this sort of thing.
Hope that helps a little. Good luck.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.