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 finished fixing the rest of the windows, though there might need to be one or two more screws inserted to make sure the bottoms are fluch with the aluminium side panes.  At the moment the weather is too cold to do anything else.