I am planning on doing the entire underside and in the fenderwells with it. I got the regular flat black. I'm also going to do the rear end. Right now, i only have the area from the mufflers back stripped and ready to go. My plan is to paint it up, and then reinstall everything else back into place. When i do my T-5 swap, i'll paint the remaining half of the car. The quart might be all i need for now. My gas tank is full of gas, so i'll drop it at a later date to paint under it and paint the straps and tank cover. So right now my working area isn't that large. I was also considering painting inside the spare tire well with this stuff. I'll just stick with the area that the rear end once occupied for now. Hopefully i can get it done this weekend.