Small update.
The wheels and tyres are now complete. Wheels were undercoated in grey and topped with 2 coats of Halford Satin Black Spray paint. Then used Tamiya's weathering kit to add a few highlights. Tyres were cleaned and the yellow Goodyear decals applied (denoting the small width and higher profile front wheels introduced to reduce grip for safety reasons).
The assembly was then coated in a single layer of clear as otherwise the tyre decals just rub off with handling. This is a shame as the clear gives the sidewalls too shiny a surface for exact realism, but on balance it is the most sensible choice. Finally I added Sakatsu valves and used a dremel to resurface the tyre tread.
N.B. If you build this and are using the Studio 27 decals, you will need to trim all the excess carrier film of the Fondmetal decals for the REAR rims. The surface of the rim that the decal is applied to is just that bit smaller on the rear than it is the front.
All the best,
Bill
P.S. I have begun another build which will run alongside this Tyrrell, Mansell's F189 (Early) --- watch AF for a WIP thread coming soon. I needed something easy to keep my interest levels up as the Tyrrell is getting very complicated now.