so am down to the last few jobs on my mk2 2.8 ghia auto,engine has a small misfire so decided to change the spark plugs but they are well rusted in how do i get them out without breaking ,i thought soak them for a day in wd40( is there a better penetrating oil ) and then take it up to temp and try and slowly try to crack them open or has anybody got a better idea.I had the the car at a mechanic friend and he didnt want to touch for fear of breaking them cheers Iain