Black metal is not my area of expertise, which is why I won't comment at all on the band. I have never heard them on disc, only seen them live the one time.
Though, from a marketing perspective, I can certainly understand why a local BM band would wear corpse paint. You will certainly stand out at most shows you play. Furthermore, there are definitely a large number of young kids who will instantly be attracted to any band who wears corpse paint.
a truely talented band can come out and just play and win the crowd over. Using cheap theatrics doesnt make for a good live show.