From: Iowan in MD/DC
I don't know what you did to get that color, but at least to me it looks like the brown for the deck is too thin and the gray plastic is showing through.
One thing aircraft modelers do is color the recessed panel lines with a dark color, sometimes black, before painting the camo colors. After painting the dark shows through the paint a bit and highlights the panel lines. IMO some people over do it, but very visible panel lines are the fashion these days.
I would think a similar technique would work on a ship's deck. I would try it with a dark brown pen, then paint over it with a lighter brown. The darker lines will show through the top coat a bit and you should get some contrast on your deck. I'm not 100% sure it will work, but it might be worth a try.
Try using what's called an ink, or a wash. You can salvage (insofar as it needs salvaging*) the deck fairly easily. Basically, an ink or wash is a very runny paint but with powerful coloring effect to it. It will sink into the recesses of the plastic. Some will be left on top, which is why after inking this you should either use a technique called drybrushing or highlighting.
To do that, just dab your brush in the paint pot as usual, then wipe anywhere from about half to 80% of the paint off onto a paper towel (this is so that you can be sure to only get the areas you wish to highlight). Then lightly brush this on top of the area you wish highlighted. I've found that while it may take some time to do so, brushing at a 90' angle to the ridge you wish to highlight is best.
This works best with water color paints. If you are using enamel, I've forgotten most of what I learned as a young lad due to the more difficult logistics involved with enamel paints.
Source: 15 or so years of miniature & wargames painting
Bill's method is also a good idea, but one that I think would be best when starting from completely unpainted plastic.
*Don't get me wrong, it's not terrible... And really, it's your model. You're the ultimate judge on how it should look.
< Message edited by Lokasenna -- 2/13/2013 4:07:17 AM >