First, I already flushed the heater core by hooking it up to the city water tap, I think the main problem is I need to put a hotter thermostat in it...plus fix the airflow through the cab and maybe get a headliner and some carpet for it. As far as fixing the Jeep, I'm gonna need the 4wd sooner or later to get to work, so I've decided to retire the old truck and do the frame-off it so richly deserves. I've still got access to the resto shop I worked at and he'll let me work off any expenses I rack up(material cost, etc.) Now for the silicone. I'm thinking cleaning off with some of that aviation paint stripper, followed by laquer thinner or maybe some wax and grease remover(sold at auto paint suppliers). Your guy's right, silicone or even silicone fumes will fish eye the new finish like crazy.