Thanks Marcus and Bish.
This is what I've done so far (after a coat of future):
1. Dark wash over the entire hull x2
Above the waterline -
2. dot filtering method with a handfull of different artist oils (raw umber, burnt sienna, blue, white, black)
3. burnt sienna in specific places and then streak downwards with mineral spirit.
Below the waterline -
4. White wash overall to fade paint
5. diluted mix of white with lighter fluid, applied by flicking it on with a flat brush. This makes it splatter. Lighter fluid makes it dry quick leaving irregular areas of fading. (Got this method from Siara).
5. Applied rust wash (burnt sienna, yellow ochre) to various areas
6. Brown wash to various areas
7. Dullcoat
8. Another round of diluted white with lighter fluid and then blended in with a flat brush.
9. A regular white filter (white w/mineral spirit) over all of this, to blend
10. Specific rust areas with burnt sienna and yellow ochre on seams and welds
That's what I've done. Totally just trying things out and seeing how it looks. Each time I do something I worry that I've gone too far. But I noticed that the dullcoat did a lot to blend things in, so the next dullcoat will probably help to blend as well. And I also plan on using a pigment over the hull to blend things (maybe a whitish pigment).
Feedback welcome. Thanks for looking.