I removed almost all of the original black finish - which was a type of lacquer, with lacquer thinner and rags (many). The result was a washed black effect. The top was dyed blue almost to the edges to give it a bit of a contrast line at the edge. The neck and back were dyed brown. No grain filling was used at all. I clear coated everything with many layers of Deft. The neck got polished out on the back, but only where your hand would normally rub, not on the back, sides or face of the headstock. The top got rubbed out so it retains the ripple from carving, overlaid with smooth glossy lacquer. The sides got a bit of leveling - not completely though, and got rubbed out. The back was left "as shot". The overall effect is a gloss top, satin edges and matte back. I didn't change the hardware, but did add a cover to the P90 - which took some doing since the route was quite undersize. I had to thin the cover quite a bit, but could, because it was fairly thick plastic, and a Gibson cover at that. The HB cover was one I had floating around here for a bit and was well worn before I put it on the Burstbucker 3 at the bridge. Not seen - a whole lot of nut work, as Gibson left the nut in totally unfinished shape, it was barely a nut at all. That took a bit of doing but came out pretty nice. The pickguard was from a LP Deluxe (two mini hums) so it fit the P90 at the neck, and I had to mod the back of it slightly to fit the full size humbucker ring.
To me, the biggest surprise was finding a very high quality flame maple top on what was essentially a bottom end low low budget guitar. I only paid $650 for it brand new - including the case!