It looks like the answer is 'both'. In addition it looks like the
proper answer is 'new gaskets everywhere'. If my car were in better shape I'd definitely be going the proper route, but it's pretty well worn so I think I'll use schmutz.
I also had a hard time getting all of the moisture out of the lights. I put them in the oven on top of our pizza stone (after I washed them thoroughly - one must always keep the wife happy
), set the oven controls on 'Warm' and 'Bake', and sat down with a beer and a Top Gear rerun. Presto.