Thanks again guys!
I've made a start at sanding out the seam lines and gouges where the gates were removed from my Vince Kit. Thanks ShortNCuddlyAm for the grit suggestion - 400 grit seems just the right consistency for this, if a bit slow going! But better safe than sorry.
I've been using wet and dry, and have been keeping the resin submerged to try to minimise any dust - though urgh it's frustrating; despite having successfully made the seamlines non-existent to fingertip touch, they're still very much visible... O.o And I'm slightly peeved about how sloppily the gates were removed if I'm honest, I'm going to have to sand quite deeply if I want to remove all of the gouges left behind.