What happens if I give the Mustang the Zaino treatment first, prior to laying down the vinyl racing stripes?

No problems? Big time problems? Let me hear them.

 

not a good idea. Car should be clean and wax free before applying vinyl. Time to wash the car down with dawn dishwashing liquid or use a wax remover on the areas you want to apply the stripes. If you don't, well, the stripes will not adhere to the paint properly.