Cheers, gents.
Dave/Martin, I did actually read the article and I found it very informative.  But for now I'm not aiming for what seemed to me to be such a high standard, and besides, I'm only dipping my toes in this model boats lark at present, so I can't justify buying more materials than I really need for this first attempt.
All I want to do for now is put a waterproof finish on a ply Springer hull.  I can no doubt get myself a tube of filler without too much trouble, and I can lay my hands on a few different grades of various abrasive papers and some 000 wire wool, but what do I do for paint?  Unless I missed it, that's not covered in the article, so the question now is - what do I use?  I can brush or I can use rattle cans outdoors in suitable weather (if we ever get any), but what type/make?  Sorry guys, but this is completely uncharted territory ...