I think it really depends on the condition.

My old Colnago Super has a LOT of wear on the paint, as well as cracking of the paint so it just flakes off. And, the logos have all faded.

I haven't "restored" it yet, but will probably choose to do so sometime.

Beautiful pristine paintwork if done nicely looks very nice.

However, the bike also works well for me as-is. So, I'm in no rush to try to turn back time by a half century.