A real car is made up of many individual parts & naturally each one has it's own color & texture. I've found that the easiest way to detail a model is with paint. On a typical chassis I may use up to a dozen different colors to emphasize these different components. Steering linkage, shocks, springs, traction bars, driveshaft, axles, etc can all be highlighted with some simple color variation. With todays metalizer finishes this is much easier than you might think. It all depends on how much time you want to put into a project. The same holds true for all the subassemblies. Engines will really pop if you pick out the various colors of the parts that make one up.
When I was a kid my uncle Dave lived next door & he raced an AH Bugeye Sprite. He would drive my aunt crazy by rebuilding his motors on the kitchen table every winter & use up all her cupcake pans to hold various parts (nuts, bolts, springs, etc). He took my cousins & I to Elkhart Lake when the track first opened back in the early '60s & I have been going back there every year since. I still recall the time he decided to use aircraft fuel during practice at the June Sprints. The ensuing fire became the topic of conversation at family gatherings for years after.
Not to change the subject, but I have run unto this AMT/MPC issue myself. I purchased a "Switchers" '32 ford sedan/phaeton on Ebay that I'm currently working on that has no company ID on the outside of the box. The instructions mention AMT & Fun Dimensions (I think) but the underside of the interior is marked MPC. Who's tooling is this? Please move this if I'm not posting it where it belongs.
Just finished this one. Don't have any pics, I gifted it to a friend. The only real problem I had was the inner fender panels & radiator were kind of fiddly to get in during final assembly. If you don't get them in the right position, the hood doesn't work properly. Other than that, it's a pretty decent kit.