I use the plastic drawer things, baby food containers, and lunch meat containers. I put wheels/tires and engines in the baby food containers and made trays from corrugated sign material for the containers.
I haven't used it, but I'm told MEK is REALLY nasty stuff and must be used in a well ventilated area.
Hey George53 - how you been? I waved to you when we flew into Detroit last month.
The rear fenders are Evergreen sheet, Rod. I bent and shaped the pieces to the body and CA glued them on. After a thorough drying, I used a Dremel and sanding sticks to the curve I wanted.