Of course there are differing qualities but to my line of thinking a water based enamel is a water based enamel.  I'd just go to Lowes or some big box builder supply and peruse the paint section.

In an effort toward 'curb appeal' the previous owner of my W32 freshly painted all the lockers, etc. with exterior latex house paint. At first I was all like ewww... But now after almost a decade it's held up surprisingly well.  And why not, it came with a 20 year guarantee.  And I'm not sure why but it seems to kill bugs dead.

tip: While you are there keep an eye out for spray can of Appliance touch up paint.  It's a 1 part spray on epoxy that works great for windlesses, tabernacles, etc.

You must keep in mind that water based (latex) paints won't stick to oil based (alkyd).

Hi, Latex house paints cannot hold up to many of the harsh chemicals encountered on a yacht, they are not fuel resistant and so forth. My last boat, a 'Bruce Roberts 38 Offshore' had Interlux Briteside one part poly on the panels inside the cabin and after 25 years it was still nice and clean and shiny. The exterior latex will not lay on to a fine enough finish to be considered yacht quality. Regarding the question of applying latex over oil, yes latex go's over oil just fine (not oil over latex) however if you or some poor unlucky new owner wants to put on a good paint job with oil or epoxy then they will have to strip it all the way down and start over if there's any latex paint present. Now there's a job to enjoy in a confined space!

Yup yer right, oil over latex. Doing apt. renovations we were always running latex over oil but now that I think of it we always painted first coat with Ben Moore's Sani-flat or the like.
Sherwin Williams makes a non alkyd (water based) "enamel" for interior use that is very high quality however it does not keep a 'wet edge' like true enamels do and if you add an extender like Flotrol or other brushing liquids it will loose its gloss (flatten). If you can get the hang of putting it on (I couldn't) it does an exceptable job. Exterior house paints are engineered to go on thick over allot of square ft. Also, I seem to remember something about antimicrobials and mildewcides and other nasty things in exterior house paint that could be good reason for wearing a respirator anyway ("kills bugs dead"). My vote is to support the marine products industry while there still is one.

Carl:  I'll bite - denatured Alochol - how does that tell you what type of paint was used?