While our county has been under quarantine for the last few years, this is
the first year I have actually found egg masses on my trees. What can I
expect in the future? Will my trees die? I live in a heavily wooded area
with some of the oaks several centuries old.

I read that kerosene sprayed on an egg mass will kill it, is this advisable?
What about wd40 or liquid wrench (I don't have kerosene). Most of the egg
masses I can scrape off but some are 10ft up. (I have a 8ft reach so the
last 2 feet can be covered by spray can). I notice for those masses on my
garage that Gumout dissolves them nicely but does it kill them?

The county only sprays the leading edge of the invasion assuming everything
else is a lost cause. We were last sprayed 2 years ago. To make things
worse, they found the emerald Ash Borer 2 counties over, so I guess their
next.