Application tips:
Buy a bag of rags (I use good quality micro fiber) and use them for the wipe off stage. I use one until it looks like it is getting saturated with 303, then move to the next clean one.
Spray very little 303 on the application rag. Too much and you will just have to wipe off more. Those who are getting smudges or a dull look are applying too much or wiping off with a saturated rag. After I'm finished, I wash the rags in a bucket of soapy water to get them ready for the next use.
I use 303 from top to bottom except for the glass. My 2007 Camry still beads water and that's with one application per year. We did garage it for the first 5 years. It has been out in the weather since then.
You will not get a show car shine. The 303 will protect the surface from UV damage, so the shine you get will be what came from the factory. So, on new cars, you will keep a clear coat shine by protecting it with 303. My all-black Wrangler looks pretty sharp from wash to wash and the water still beads. All the black plastic looks good except for the hood latches. That have turned gray?