Wondering if there is any information on this site about the hulls of plastic ship freighters. I would like to achieve the well worn look many of they

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Wondering if there is any information on this site about weathering the hulls of plastic freighters. I would like to achieve the well-worn look many of the vessels in the St. Lawrence Seaway achieve. Thanks in advance
 
This is an interesting approach. As an under grad I was an apprentice at Hawker Siddeley and actually skinned parts of a Harrier and Hawk. The skins weren't prestressed nor were they pre drilled. The skin was pressed to be a rough shape using a huge mold. Then the craftsmen took over. The very crude pressed skin was often a compound curve and thus only approximately matched the profile of say a Harrier air intake. A large very bulbous structure. They offered the skin up and noted where it fit well and where it didn't. They they took it to a small roller machine where two if them woukd proceed to add spring ir stretch the skin. When it fit well they woukd very carefully drill some pilot holes to afix it to the frames using rivet hole clamps. They the gradually placed nore and more until the skin fit exactly to the underlying frames. World War two aircraft often used various shims to achieve the shape as they were building si quickly, but the Harrier was built with incredible skill and no bodging!
The only time you'd see oil canning was on say the skin above a Hawk in flight where the fuel inside was pressurized. Eventually a small set might be visible bit it was due to frequent inflation nit a lack of stressing or inaccurate build.
I also view a world War two wing as only a speciously stressed skin. The spars were the wing strength, not the skin per se. They added strength but the spars carry all the main loads. Whereas a Harrier only had a keel for the gear and the rest of the structure is a true monocoque. The wing skins are so thick as to resist any kind if oil canning. They have to survive a 500 knot birdstrike, after all. They're more than a quarter inch thick on the leading edges!
Buy I do admire the ingenuity of this technique, even if in my view it's a bit to uniform and heavy. It's well done but is it to scale? A quarter of an inch is only two pieces of paper in 72 scale! Not much.
 
Some aircraft modelers will carefully scrape out depressions between frame members with a curved X-Acto blade for the depressed look. Results can be pretty impressive! Here's the first link I found:

Thanks for that link. It's all very interesting to me though I think it's a little heavy handed on some of the models. I'm sure he would produce a more representative effect if he just used the buffer and some polishing compound.

I do admire the ingenuity of this technique, even if in my view it's a bit to uniform and heavy. It's well done but is it to scale? A quarter of an inch is only two pieces of paper in 72 scale!

Agreed.
 
For rust and chipped paint tyr searching youtube for scale model chipping rust techniques. There are many good ideas for use on tanks, cars, aircraft, ships.
 
“Oil Canning” appears mostly on welded ships because the shell plating is welded to the frames with fillet welds. If welding heat is not controlled, the shrinking welds cause the oil canning.

Where ships rub against docks, lock walls, etc, a similar situation can exist because the edge of the frame is much stiffer than the plating. The paint gets rubbed off the plating in way of the frame but not in between two adjacent frames.

Roger
 
Roger is quite correct in what he says however the "oil canning" is an example of keeping the cost down.

Traditionally in steel shipbuilding, after welding a special propane torch with multiple heads is wheeled along the outside of the hull opposite the bulkhead internal fillet welds which causes the outside layer of the outer plating to shrink removing the dips between bulkheads. I have used a similar technique to remove "waffling " in full size steel bridge decks where the deck dips between transverse ribs due to welding.

Sorry for going off on a tangent. Another one to look for on Youtube is Sen Navy model yard. A very talented modeller from Taiwan. Yes he builds WW2 warships but his techniques can equally be used on merchant vessels
 
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