All right. After have given it some thought about the wrecked train I posted about in the HO forum, I decided I'm going to turn those wrecked cars and locomotive into an actual train wreck scene. I have removed the motor along with the gears, worms, wiring, etc. I am putting a Cummins diesel power plant in the engine compartment. How ever I want that wrecked look of a few doors slung open and half torn off showing the inside of it. Any good idea's of how I can cut these door's out without damaging the paint and without making sloppy crooked lines? I'm trying to get as close to prototype as possible. Also how can I get the roof's and sides of box cars to be bowed upward so it looks like the real thing when all that weight collapses on it self? I figured for a fire look I would go outside on a couple cinder blocks and set some old parts sprues on fire and hold what items I want to look like they caught fire over the tops of the flame just close enough to catch the soot but without melting the plastic. Thanks in advance for any info.