Your base kit looks like a vacu-form. What was it in its former life?
Original wingsection plasticard from scratch, front fuselage master for vacform fashioned from Airfix Boomer canopy and milliput, rear fuselage and tail started life as a Matchbox Ju188. Engines from Wirraway, u/c cast in whitemetal from scratch. Props from Matchbox Bf109 - all eventually cast in polyurethane as seen below.
and for those wishing to scratch one themselves..