MJ, thanks for your comments, regards the tyres I sprayed them with german grey, and then after giving it a full 24 hours to dry I masked the tyre off with Daley-Rowney art masking fluid to spray the hubs with the base colour. I then gave the hubs a very thin wash made from white spirit and burnt umber oil, removed the masking fluid and dry brushed with Humbrol 33 matt black.
Puma112, the barrels were just drilled out with a new 11 blade, and the model took a little over 2 nights which included waiting for paint to dry etc.
Vinnie