im on a mission no lol...

just looked up some pic on google, notice the pic below, some vans and some people wandering around...

you can see the heat from the engine and under the vans ( exhaust pipes ), and also from the peoples heads.....all of which are un-insulated., but also notice, the body panels of the vans are reletivley cold...just goes to show a small ammount of inulation, combined with some thoughtfull heat difusing can fool IR cameras