Powel - the white paint on my Sierra is Tamiya TS-26 Pure White, over their Fine White Primer. Both were sprayed from the rattle can.
Eric - The Ford Sierras dominated Group A (Touring Car) racing in Australia and Europe in the late eighties, and into the early nineties. For a few years in the late eighties, they were unstoppable in Australia, although the road version was never marketed here. This was during the era of the global 'Group A' rules for homologation of touring cars. Eventually, it all went pear shaped and Australian Touring Car racing went to a local set of rules that resulted in the 'V8 Supercar' series that still exists today as the premier motorsport in Australia (Grands Prix excluded).
V8 Supercars is no good for modelling, you can't get the right cars in kit form, so I have to revert to these older ones to do some of the famous Australian racers of that era. There are decals around to do about ten or so different ones, and I have most of them now. The problem is that Tamiya haven't re-released the kit since the early nineties, so they attract a collectors price now. Every now and then, I manage to get one at a reasonable price at a swap meet, so I've got this one and three others in my stash, and two on the shelf from 25 or so years ago.
The main competition in that era were Nissan Skylines (Tamiya and Fujimi), BMW M3s (Fujimi) and the Holden Commodore (can't get, or maybe rare resin kit) so there is room to build an interesting collection.
Cheers
Tony