@CrownKote:
First:
Chris, sorry about the earlier reply where I mispelled your avatar.
Second:
The reason I added this statement in my post (#4 of your thread).....
"Sometimes "scuffs" and other blemishes just won't come out. Relay the message to the customer that solace can be taken that the underlying paint has not been compromised, Afterall, another piece of PPF is less costly than a re-spray...moreso than the painter's "Corvette Tax" that he undoubtedly would impose".
...was to share some information regarding the removal process (buffing) of the PPF. To me, it is similar to buffing a bc/cc paint's top-coating in the cautions one must take.
There are three layers to PPF: The "protective polyurethane" top-coating; the middle layer of polyurethane; and the lower layer of adhesive baking.
There are also two versions of PPF. One version has a "protective" PU top-coating of an aliphatic polyurethane. The other version has a "protective" aromatic polyurethane top-coating.
Long story short

: Aliphatic PU is non-yellowing; has the best UV/color stability and weathering protection; excellent chemical resistance; and resists staining. It is the best for exterior applications. Aromatic PU, although excellent in some of the above categories, is more susceptible to yellowing, less UV/color stability, and is recommended for indoor/underground applications. The PPF with the aliphatic PU top-coating is, of course, more expensive. It is also the best for automotive purposes.
Herein lies the comparison I make between PPF's top-coatings and clear-coat top-coated paint. We are told by OEMs, and others, to not remove more than .5 mils total of 2-2.5 mils of this clear-coat paint's top-coat because there is where the majority of the UV protection/inhibitors lay. With PPF the "protective" top-coating layer, that has the UV protection and other inhibitors, is usually only between .3 and .5 mils thick.
To me, this would mean an adjustment in ones buffing process thinking. Whereas removal of .5 or less mils from the clear-coat may be acceptible, removal of that same amount of the PPF's "protective" PU top-coating may make the PPF look good now, but would surely increase the possibility for the PPF to start yellowing and "fail" prematurely....and, thusly, would void any warranties.
Note: There are some blemishes on sections of my PPF that I'm going to live with until the warranty expires.....I put it on to better enjoy my ride without so many worries of paint blemishes occuring...We have
FUN in it!!!
Just some thoughts I had regarding PPF.
Bob
Edit:
Chris...Sorry you had no luck....If you want to, relay the above message to your customer. It may help his thinking process on this matter. I bet you probably enjoy him being a customer. I'd also bet he wants you as his detailer!