I've been adapting Shipbucket drawings into Minecraft for a couple of years now. I've put thousands of hours into it, with a great loss of most of it after a world corruption. I did take a load of pictures though so at least have that. Initially, I built them with solid colors because I didn't think it would be possible to do a full pallet. I have since developed a standard pallet that I use for warships, which is what I mostly build. I've built as small as a torpedo boat all the way up to the Yamato. I even have a "turret Farm" where I literally just built turrets, and where I prototyped color pallets. I've recently started building aircraft and firearms and tanks too.
(I have a lot and I'm not sure how images work so here's a link to my Deviant art, where a have a lot of them)