Quoting mordecai mordecai how do you keep all those white pieces white though... mine always get yellowish after a while.
There are two cases: Pat. Pending collection parts and new parts that I use to create MOC's.
Vintage parts are strange: some of my parts are over 50yo and are in good shape, others are deeply yellowed. The parts of the early 70's are usually really white. The ABS plastic of this era was much harder - hence more difficult to disassemble.
As for new parts, the plastic is softer: it makes them easier to use for kids. But they seem to be more fragile and age badly.
I have first tried to save money and have purchased both new and used parts. Wrong approach: all the parts must be new for a good result. If you are picky on the tint, you must avoid buying the same part in different lots. All in all, light is the enemy: you must store your white parts in closed boxes and must not leave your creations exposed too long to full day light. Ultraviolet is what makes white parts yellow. Blue parts are altered too, but it's less visible.
White parts have a special way to catch the light. In daytime, you get a plain milky white, while artificial light turns them ivory (especially on the table of my living room!!!). I love this ivory aspect. Then, when I have a sunny morning, the magic happens: there's a sweet spot on this table and 10 minutes during which I shoot as many pictures as I can - lol!
Ah yes, I remember those naive cars: the 420 Police Car was my first Lego set. I think that the square wheel arches just stand out in my eyes because they're dark and angular and contrast to the flowing white lines of the car bodies. Of course I'm being totally unhelpful here, as I haven't made a constructive suggestion on an alternative!
Only for some visible details, no SNOT in the structures here.
Quoting David Roberts
I wonder if you could use some SNOT techniques to get rounder wheel arches?
Yep, SNOT will help. I have neither used the classic arches yet, and I'm thinking about it for a larger car. It will remind me the naive Lego cars of my childhood, like the 1972 379-2... Small scales imply tons of constraints and it's part of the fun!