Personally,
I really dont see the use of electric affecting my finishing choices at all. I now of no other system that will give the reliably for me, that I am willing to use. I will continue to use automotive base / clear systems.
of course thats me, and in thinking further, I beleive I will take the same steps towards the interior engine bay that I would with a glow airplane, though probably different material. I am somewhat concerned with having to fly in humid, or as some contests in the NW go, VERY liquid humidity. SO in order to maintain integrity and not risking alignment changes due to water absorbtion I will likely coat the inside of the front end with catalysed clear Urethane to seal it. Just my thoughts,,