Tricky unstable chemical reactions that take scientist "perfect conditions" to pull off, are done in High Schools by idiots 10 years later. Chemicals "learn"? A marine biologist shared this with me years ago. I'm passing it on for what's it worth.
Part of the reason that we have distinct "belts" at all is due to the interaction of gravitational forces exerted by large bodies like Jupiter and Mars. Given the tidal influences of these bodies, stable orbits will only be found in certain narrow bands and so all objects that were outside that band will have long since had their orbit decay, leaving only the objects in the gravitationally stable band and creating the appearance of "belts". It is roughly analogous to how electron orbitals can only be found in certain energy bands as well, only in this case it is gravitational forces.
The Kuiper belt is being quantized into bands that suggests the interaction of significant gravitational fields quantizing the possible stable orbits. The problem is that this requires a significant second gravity source that we haven't found yet.