Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Mine looks like this. Like paint is flaking off. We’re they originally painted?
Hmm... I know they clear lacquered and prior to that, the bare alloy treated with a 'conversion' surface treatment on the Honda 4's (like Alodine used in the Aerospace industry ) and I think based on a chromate system. But never heard of them being painted with silver. Exceptions are the smaller and 1960's bikes like the S90 and 450 bomber that were painted. May be wrong of course but it's definitely not what Vic World uses on sandcasts.
Why not just try sanding one and see?