I think the point is, jibsail, that it would be a wise move to get into the good habits and routines at the beginning. Try washing and priming your figures for safety's sake, if for no other reason. It takes 20 seconds to wash a figure, 20 seconds to dry it with a can of compressed dust remover; 30 seconds to prime a figure well enough (in light, multiple passes), and 30 minutes to let the primer dry, if you're in a hurry. However, I do recommend letting it cure overnight. Remember, patience is the key to any good modeling, and figure modeling is no exception. In fact, I'd say even more so in figure modeling / painting, if you wanna be good at it.
To paraphrase Al; it's a drag to be putting the final touches on a figure, only to spot an ugly seam line. Can ruin your chances of kudos, or placing in figure contests, should you ever decide to go that route. Whatever you decide to do with your figures, it will just simply bum you out.
Good habits are easy to start, seam lines are hard to hide.
Steve
Steve M.
On the workbench: every tool, paint, brush, glue I own