Thanks Panzerguy, man it's sooooo good to be back on the bench again! I'm having a great time with my build. Thanks Dupes for extending the GB a few weeks so we could finish up our builds, much appreciated!
I just sprayed the wheel centers using a circular artist template. I had sprayed the wheels the rubber color (Flat Black mixed with a touch of gray to lighten it) a while back. I stuck the wheels down on strips of masking tape, although 6 of the wheels had to be stuck into little holes in a box as the shafts were too long and skinny to stick them to the masking tape. Using the 17/32 inch hole I simply held the template over each wheel then did a quick spray in the whole being sure to go at it from several angles to ensure good coverage.... took all of 10 minutes, piece of cake!
Now off to paint the soft edged wavy brown stripes.