Well done for your first go at it.
The packs and storage do look a little out of place. Maybe do a light drybrushing with a lighter shade of each base color to bring out some more detail......
Welcome aboard.
I agree... and I really enjoy being in a brick and mortar hobby store. I recently discovered my closest one, an hour drive one way, but its well worth it.
My reference book identifies them only as "gas bottles ".
The book shows three colors, yellow, rust and green.
I don't know what the three gasses are, but on a steel ship I'll wager some, or all of them are for welding.
I added the forward funnel stack / superstructure. There is about 1/16" gap where it meets the deck. I screwed around with it for awhile, but that's as good as it's gonna get. There is too much delicate stuff already attached to it to get aggressive enough with it for a tight fit.
I might try...