Seized spark plugs

[lolsteve]

So I'm going to hazard an educated guess that the spark plugs in the MK2 will be a pain to get out. Any advice on what to pour into the spark plug wells to ease their removal also whether to do when engine is hot/cold/warm etc

Have seen people say yes to hot as it helps free them, no to hot as itll strip threads.
WD40, don't use WD40, a tablespoon of engine oil, compressed air etc etc