To be precise, cleaning up what I thought was 4 good wheels out of 9 turned out to be 3 good wheels out of 4.
Wheels 1, 2 and 3 are great, see pictures below.
Wheel number 4, now that's a real trouble maker.
Cleaned up the outside, discovered what looked like a series of cracks and in places delaminating.
Rubbed some black paint into the area, yep, scratch one disc wheel.
First series of pictures is the outside of the wheel.
Two cracks in one
This one seems to go on for ever
The next few pictures are on the inside of the wheel in the same location, so there was no doubt they were all the way through.
Will head up to see Grant Fowler http://montythe1928chevrolet.blogspot.com.au/ at Trafalgar bright and early in the morning, swap over 4 bad wheels for the ones on the spare rolling chassis, and hopefully will get some more good ones.