I think it will be luck of the drawer..
Depends on manufacturer and storage aswell whether they've been stored well not stacked upon etc.
Only experience I have, I needed a new bonnet for my last civic. 75 quid brand new aftermarket part. Was perfect. Couldn't fault it one bit.
But I think if you could test fit before committing to paint would be beneficial.
Or as you say used originals from a rap yard. They don't tend to rust on the front so should be able to find a good set easily enough