If these had existed in the 1990s I might have purchased them instead of 1/6000 fleets, but it would have been a hard decision. The 1/6000 Figurehead line was beyond complete – every warship used in WWI, plus hypothetical BBs and BCs and CVs that never launched (and some which never left the drawing board). I have them all.
The painting techniques look about the same, and probably about the same difficulty. On tiny ships, most of the work is done by drybrushing. A little bit of picking out details in contrasting colors is required – "scale black" (dark gray) for stack tops, pitch black for the stack holes, a lighter gray to pick out the main gun barrels that drybrushing didn't quite get, colored turret tops or stack stripes, maybe a light gray or off-white for the boats, etc.
The hardest part is painting the horizontal deck a contrasting deck color. It goes something like this:
1) Paint (or spray) entire ship overall darker gray
2) Paint deck tan
3) Fix superstructure and turrets where deck tan got onto vertical surfaces
4) Fix deck where base gray from fixes on superstructure and turrets got onto deck
5) Fix superstructure and turrets where deck tan got onto vertical surfaces
6) Fix deck where base gray from fixes on superstructure and turrets got onto deck
7) Fix superstructure and turrets where deck tan got onto vertical surfaces
8) Fix deck where base gray from fixes on superstructure and turrets got onto deck
9) Fix superstructure and turrets where deck tan got onto vertical surfaces
10) Fix deck where base gray from fixes on superstructure and turrets got onto deck
11) AAAAAAAAAGH!
After that, the entire ship can be drybrushed lighter grays in stages, carefully brushing only up and down to hit only vertical surfaces and avoid the deck. If all goes well, the deck stays tan and doesn't need to be fixed again.
I see the LoA 1/4800 ships have anchors and anchor chains, and Barry painted them. That looks really hard to do, but it looks nice if you can accomplish it.
I never tried painting anything smaller than 1/2400 with a camo pattern, like WWII ships. I would have thought it impossible until KniazSuvorov showed it can be done well