Thanks for sharing your tips Christodav, I've been following those pretty much and going well so far.
I worked out most of the sanded gluboost dust that had collected in some wood grain I had missed filling, with a toothbrush as Sonic had suggested. Few small ones left but hardly noticeable.
I've done the decal (used a laser decal paper from Dr decal and Mr Hyde). Decal came out a lot thinner than I thought it might, which is great.
I've started on the sca acrylic clear coats, progress pics attached.