Having started on the Bolt Action Home Guard Mark IV (male) World War One Tank. The first stage was to clean the resin and metal pieces and then wash the resin pieces in warm soapy water to remove any residue from the casting process.
The parts were quite easy to clean and they fit together quite nicely and easily. Looking at the pictures of HMS Excellent in 1940 I will be leaving some parts off, notably the top fascine rails.