The sanding residue is sanded practically down to nothing and if it does anything it aids in the process of buffing if done right.
If he has the pad at an angle, that's his problem- but not a big enough one to post a fail picture about it on the internet- one that's not even funny, just makes the photoshopper look like a doofus.
How do you think body lines or curves contact a buffing pad? oke:
Just have to be careful.....
The sanding residue will not "aid" in helping properly polish the paint. It is abrasive unto itself; much less the remnant sanding grit aggregate that will be left in the slurry...it will not diminish or break down like the polishing product abrasives do and will continue to scratch (sand really) the paint as it gets caught in the foam pad. The final paint finish will have random swirls and deep sanding line halo's from said aggregate being caught; this is not acceptable in general to me; much less for show quality finishes or collector cars.
Yes; you have to hold the tool at the various angles to get the job done for the body lines and yes, you do have to be careful.
:beer: