Hey NW... DrewC here, I don't post very often but find the input and conversation rewarding. As for your question on opening doors, I strongly recommend the "thread" method. Gregg actually did an article on this quite some time ago - but as I sit here wrting this I find myself too lazy to go research the volume it was in. Any way, I believe the type was a poly -mercincile blend (forgive the spelling). It's the cleanest neatest way to open the doors and trunk lids. Also, another "tip" would be as some have offered; the back side of a #11 xacto.... well, it's actuall the tip of the blade you will be using as that is sharp as well. Best advises though overall - TAKE YOUR TIME with the blade tip and with the thread, use ii in a swaing motion - as the thread heats up you are really buring your way through!
Good luck, let everyone know how you did!
DrewC