pb blaster is ALL the rave and i dont get it, i've never seen it do anything besides make a mess.
freeze off actually eats rust, you can spray it on a horribly rusted bolt or piece of metal and watch it react.
i use about a foot of whatever vacuum hose i have handy lay one end in the plug hole and stick the straw in the other end and just spray until the plug hole is about half full or so or until the hex section of the plug is covered, then break them all loose and let em sit. when you get them out there will be NO buildup on the long part of the plug where it always is, it eats it away completely or softens it enough to where it falls off during removal.
incase you dont know autolite makes a one piece plug for them too, they are about $25 each though. hell a better fix would be skinnier tips so the buildup doesnt catch coming out but i guess nobody is smart enough to do it that way.
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