RE: GSP Zero
Weathering looks good. A technique I might try on mine is to use a scotch brite pad vertically on the fuselage, chordwise on the wing. This has been suggested by Sean McHale that he used on a most excellent BT Spitfire he built. Can't remember the web address now, but do a search.
Anything looks better than that fresh paint that they come with. So how did you do it??