Sean T. -
I think it effects it, but it's hard to quantify. For windows, at least you should be able to do some tuft testing. One one
I was thinking of trying to cover my door handles so that only a "finger-hole" exists to pull open the door :
There would still be a bulge and a much smaller hole, but a smooth cover should make it a little better (right?!?!?!?)
I just found a picture of your Taurus :
At first I liked your door handles better than mine, but now I see that the whole thing kind of bulges out a little but. But at least the design is flat. Is the handle plastic or metal? If it's metal, you may have a rear-earth magnet neodymium option for installing removable-door-handle covers.
CarloSW2