Nice job, DW,
I have used spar varnish for most of the out-door items I sell but, always worry about how quickly it will amber
and how dark the discoloration is going to be.
That would be a real concern with the white sign like you made.
So far though, no one has ever come back to me with any concerns about their signs or out-door decorations.
Thanks for sharing and God Bless! Spirithorse