Actually, everything I know is based on how things work now, extrapolated at times into what might work at some point in the future. Y'know, the way things always have and always will work. You can't nail a bunch of tin cans together to make a car, and (more importantly) taking a fairly dull basic design and putting more jagged plates on it doesn't make it look like something that was scavenged together any more than putting a spoiler on your compact fools anybody into thinking it's a racecar. I spend quite a lot of time scavenging, it's how I get a good bit of my stuff. When that involves replacing parts and the replacements I find weren't really initially intended for the function in mind (which is always the case, really), the resulting look is very distinctive. It does not make the things look like slightly uglier versions of the originals.
The original Star Wars films were relatively good at this, because they were designed in something of the same way- stick what might be a coolant system there, radar dish here, gun turret here, and so on. They were big, shapeless, and looked ungodly complicated, but looked like they'd do their job, at least until they suddenly caught fire for no particular reason (no really serious imbalances or anything like that thing has, etc). Most of them had big random stubs of machinery poking out of them doing God-knows-what function. It was like the space version of the Mad Max cars. That's what scavenged equipment looks like. Give or take an art department to make sure the thing won't make your eyes bleed.
Of that thing, I'd say the cockpit and rear engine were all right, maybe the bottom section too if they really can't do any better than that block, because at least it doesn't look like a part of the original vessel. The rest looks like they stuck brown roofing tiles on a perfectly serviceable vessel. Which... come on, there's no reason in the world you'd ever do that, and if you can't come up with a more imaginative texture you need to find another job, plain and simple.
