Why are some vehicles not available for custom painting?
iRacing does not offer an official painting template for some vehicles in the sim.
Custom painting is not available for the following vehicles:
Mercedes-AMG F1 W12 E Performance
Mercedes-AMG F1 W13 E Performance
Per iRacing’s agreements with these car manufacturers or owners, custom paints are not supported at any level in iRacing, and you won’t be able to upload paints to Trading Paints for these cars.