Hillville, I saw something here in the Scale or Warbird forum that might help. Basically the wheel wells are lined with cardboard, 3X5 cards work. Strips of the paper are glued in to form a well that matches the area covered by the doors. The wheel is surronded as is the leg. zink chromate yellow is applied to the paper and exposed wood to fuel proof it. If you dont' want to do this it is not a big deal. Just paint the the area with some fuel proof paint. Wartime planes were left in the primer green while modern planes use paint that resists the corrosive hydrolic fluids in use today. White is a favorite.