Forza Motorsport 5

I can't find from my research. Feel free to point out the answer if you can find it. The definitve point at which you start earning money from a paint job.
Most seem to agree though that it's tottaled per day and after a certain obscenely large amount of laps/usage in a day you earn money.
So really you need your paint job to go viral for that to happen. Which can happen if you are talented. But the best way I can think of to help this achievement along for everyone is to have a specific way we can single out paint jobs of people who need the achievement.

So this guides has two parts. Getting the achievement and helping others.

1) Getting the achievement.
Design for as many cars as you can a paint job. Be as creative as you like. But for sake of recognition make the base colour white. And have a very visable 'TA' on the bonnet of the car. The more visible the easier it is to find and download.
Save it with the description as ' TrueAchievement '

2) Helping
This is the most important part. Help others. If everyone who posts paint jobs also downloads and races a few we should be golden.
Just search for the keyword ' Trueacheivement ' and find a white car with the letters TA on the bonnet.
If you do this for every car you buy, you'll be Helping every time you race.

Ps once you have the achievement please delete your paint job from the market place so others can be helped out. Thank you.