Applied undercoat to the inside of the cab door, mixed from brick read with a little black in it.   Made sure it was thinned well and warmed it so it would dry.   Next, I continued with the cab window by starting to strip the paint from the opening glass.  The next day was dry and sunny so I took the opportunity to continue prepping the wheel rims, wirebrushing the outer faces of three and giving them a coat of red oxide.  It was a bit thin in places so a second coat will need to be done soon, weather  forecast suggests the middle of next week.  The cab window frame was not screwed together, so I removed it from the glass to make painting easier.  I straightened the wonky offside window (no.4 from the fornt) as much as I could, so its slant is not so noticeable from inside as it was, although it is not perfected, so I started to fix it permanently.  I will finish fixing the rest of the windows so I can attach the upper beading whilst the weather is too cold for anything else.