I will be painting my 1969 in it's original color of Sand Beige this year.

Would like to try to keep it true to the way they came from the factory in terms of paint.

I assume Glasruit would be what I should use.
Would single stage be correct?

Anything to take note of when trying to paint it 'concours"

Also wondering what others have done here to the underside in terms of protection paint?