Thanks for the replies! I was a bit concerned as there's not really an EAA chapter here in Spain, so I'll be on my own for the first bit of time as I begin. I'm actively looking for someone with RV experience here, however. So hopefully I'll find them soon. In the meantime, there's always the possibility of redoing the empennage later if it looks too terrible, right??
Seriously though, I was worried about some scratches and knicks in the aluminum from errant spinning drill bits and such. Also there's the occasional "spin-off" when I don't quite get set above the match drill hole I'm trying to ream or final drill, resulting in a curved "adventure" across the surface with the drill bit. Luckily these things buff out and a little primer will make them no worse for the wear!