Sorry Joe, I'm a bit late to the party but couldn't resist having a good read of your progress so far.
I appreciate people being modest, but in your case, it was unecessary as we know of old the skills and experience you have from the yacht build at least! I saw the tube in the background of one photo (I think we are all a bit nosey!) and thought; 'that's the funnel waiting it's turn for processing'.
With regard to weathering, the art is to make sure the basis is sound, so most modellers seal the initial paintwork with gloss varnish giving a hard surface to work on, and also (If you use a chemical/thinner proof varnish) you can strip any weathering off that you don't like. Also, like with your rudder experiments, using old models. or painting up a bit of ply the way you would your hull, and then testing weathering materials/techniques on that means that until you are happy, your vessel remains in tip top condition.
But, at the end of the day, it's your model Joe, and with or without poo streaks down the gunnals, it will be a superb model.