Oulton Park and Kyalami.

[Chaswin]

Definitely all photos were taken prior to July 1970. The guy with the Scott must have had an early full-face helmet. Interestingly this Scott has a red cylinder which does not denote a high-performance version as might be expected. The red colour actually denoted a standard road going spec. I think green was used to denote high performance versions.

[GregT]

The red cylinder block on that Scott means nothing. It will be ported to modern specs as most were even then and are now. I suspect if you wanted to re- enamel one using the correct materials, red is readily available from marque specialists.
And yes, you could use any high temp paint - but the genuine finish is a vitreous enamel.

I see Bell introduced the full face helmet in 1968. I never saw one here in NZ until mid 70's. Visiting Americans like Ron Grant still used open face helmets in '72.