Since I made this one for F1 2013, I have finally made this skin for F1 2014. It also includes Massa and Bottas' helmets with Martini colors being replaced by real Rothmans colors.
I don't know what to do with the frontend yet, but if you want it to be changed then I will do it.
Extract the "wi2" folder to the "cars" folder in your F1 2014 game directory.
Only SD resolution. HD resolution will come in around November or December.
Have fun with it! If you don't like it, please give constructive feedback and I will answer.
Rothmans-ish Williams Livery 1.0
Rothmans-ish Livery - back in 2014