Some pics from earlier this week. I was messing around doing some testing on CM tires, and was joined by a few of the good folks from GTP

Turned into a really fun session 👍
Black Trueno - UKO_DriftNinja
Panda Trueno -rsgriff
Pink Trueno - alpacaflip
Orange Trueno - LazyLiquid
Black Levin with the horrible rims - ME!
Corollas in the Mist...
After everyone left, alpacaflip and I brought out the Sileightys for a burn around a custom Tokyo cart track.
Alpacaflip
Twitch
And a few pics of my repainted Levin lol
...dude in the orange shirt is stoked!!
Edit:
There are a few ways of doing this.
The first, and easiest, is that people are using colors that come from cars in the New Car Dealership. They are simply buying the same car from the dealer in a specific color over and over. As long as you have the credits for it, the NCD is an unlimited supply of paint chips.
The second way to get more than one paint chip of the same color involves using an external memory device (eg flash drive), along with a secondary PSN, to create duplicates of a specific paint chip. This is called duping, and can be done with any tradable item in GT5.