I used 5 cans to do 4 wheels and the door handles, but near the end of the can you get a bit of an uneven spray, so when i got to that point i started a fresh can (a tip from ninjaZ, ty ).
Thx , no i didnt bother masking the tyres, it peeled off very easily. The tyre dressing helped with that tho
Thx i really like the Z center caps too, found them on Ebay