I use Dremel Cut-Off wheels. They are made from stone, so they don't get hot like metal does. They will break before the model breaks. They cut through plastic like butter! Be sure to were safety glasses...
Man the detail you go to build a model Bobby! Outstanding as always. I have a lot of patience and persistence when building but those wheels are over the top!
A bit off topic. I remember the first time I wanted to get detailed. I was building a replica of the Motown Missile Duster and wanted the doors and trunk to open. I started with the trunk slowly scribing the line away and trying not to do anything to the window frame. It was very thin. I must have worked on that for a week in my spare time till I had it removed. Then I couldn't figure out how I wanted to build it up like the trunk drip rails would have been. That was long before the Coffin Corner and I've since figured that out due to a lot of things I've seen here in your threads.
Wanted: Aurora Hot Rod kits & boxes, VW kits (really looking for an old built up Smug Bug or Muscle Bug), and MPC Funny Cars. Always looking for Monogram kits molded in different colors as well.