I am not sure why you guys are still so confused about this issue.
I hope my post will set it straight once and for all.
1) You get/receive special paints for every 30 cars you get into your garage.
2) When you get the message / announce for the new paint: the New color paint being receive is completely random!
3) ... with Chrome paints being a much rarer occurrence than matte paints.
4) You have a second choice other than push X to accept it:
You can exit the game without accepting the gift, restart the game, get another announce with (hopefully) another color. And If you are still unsatisfied, repeat step 4 until content.
I started doing this when i got to my 120th car, repeated the process when i got the 150th car, repeated again when i got my 180th car, and again with my 210th car, and yet again with my 240th car.
So far i got 3 Chrome golds, i could have gotten 5 if it wasn't for other Matte Paint and Silver Chrome that i wanted to have instead of the Gold Chrome.
Just for reference, i noticed that usually, it would take me around 30mins of looping Step 4, and going through about a dozen exits, game loads & 12 different special paints before i get the Gold Chrome.... Therefore count on wasting on average 30 mins before you get the Gold Chrome, unless you are lucky, which happens. But dont give up.... it's better than buying 750 cars and still hoping because you Accepted their random gift each time... You should always ask for the gift receipt and return the gift for what you want
What i haven't tried yet is :
for example, when you know you are one car away from your 30th,
why dont we buy a kart as the 30th car?
And of course, right after we will get the message for the new special paint,
we go through the above process (step 4) until we get the desire special paint. ONCE Satisfied.
And here is the question:
Can't we just sell the kart we just got, which would reduce the number of car in our garage by one (logically), and which means we can buy once again
to make for the 30th car.... and so we SHOULD get another message for special paint, right ?
This method means that it would cost us money (lose of value in car sale)... but we would technically get more special paints at our wishes by looping around the 30th car bonus...
Has anyone tried that alreadY?