Originally Posted by Dirtmonkey8
When the plugs/bolts do start moving don't try to bring them straight out. Work them back and forth applying more penetrating lube. Out a bit, spray, back in, out a bit more, spray, back in...
Don't know if "real" mechanics are for it or not, have to ask Guy. When a bolt or sparkplug is stuck I try everything. Penetrant+time, heat, tapping and sometimes like you say -alternate tighten a smidge with lefty loose-y. not much just a little bump to the right.