Tweeter repair, Shellac vs Damar?

Yesterday I got lucky, scored a pair of roadkill KEF C40s.

Unfortunately, the tweeter coatings are dodgy, almost completely dissapeared on one, highly cracked on the other.
Careful work with Shellite (What us in Aus call Naptha) got the remains off.

So, the next step is to re-coat them, following the ideas in this thread:
https://pinkfishmedia.net/forum/threads/restoring-kef-c40-loudspeaker-system.293967/

But it occurred to me that I could use Damar varnish as an alternative to Shellac (I have both), however neither are ideal; I assume both will set hard, whereas the original coating appears to have been somewhat flexible. Opinions?, comments?, Alternatives?

(if the worst comes to the worst, I have other alternatives I could use behind the original KEF faceplates. Plan is to restore them to original to see how they sound, more to come whn I've got some pics & measurements sorted)
 
I posted about this not long ago. If you go to the linked post, there are pictures of the before and after tweeter coatings in an earlier post. I've now done two pairs with good results.