I am the proud owner of a swirl free 2003 Obsidian Black G35 Coupe. I have never heard of the G35 having hard clear coat as a matter of fact if you search this forum I believe you will find the general consensus is that Infiniti's paint is very soft. I don't entirely understand what exactky you have on your front bumper but if it has any kind of edge to it make sure you tape it prior to polishing. This also goes for the small clear film pieces in front of the rear fenders. It sure is easier to tape than to try and clear dried polishes off the film edges. It takes a lot of work to get and keep a black Infiniti swirl free. I just bought a 2010 Mercedes Benz E-Class Coupe which is also black. Now, German cars are supposed to have hard clear coats (from what I've read). Haven't done any polishing on it yet but will be interested to compare the two.