First, here's the products, pads and tools I used...
DP Waterless Auto Wash Wolfgang Elastic Poly Clay Wolfgang Clay Lubricant 3M Automotive Performance Masking Tape Porter Cable 7424XP Lake Country Flat Pads 5.5" Orange, White & Blue Lake Country Hydro Pads 4" - Cyan, Tangerine
Griot's Garage 3"
Orange and
Red pads
Wolfgang Total Swirl Remover Wolfgang Finishing Glaze Wolfgang Deep Gloss Paint Sealant Wolfgang Fuzion Cobra Supreme 530 Microfiber Towels Cobra Arctic White Edgeless Microfiber Polishing Towels Gust Easy Duster Microfiber Gloves Glass Master Pro Glass Cleaner Wolfgang Black Diamond Tire Gel Wolfgang Instant Detail Spritz Cobra Indigo Microfiber Towel Cobra Flex Foam Tire Dressing Applicators Washing
The car arrived clean, so instead of washing the car I carefully wiped the car clean using DP Waterless Wash.
Tip to help prevent rust...
When it comes to classic cars many owners prefer you DON'T wash their car with a normal car wash because you'll introduce water into all the nooks and crannies of the car where rust can form unseen. Due to the cost of doing a body-off restoration in order to remove rust a waterless, rinseless wash is a good service to offer your customers who own classic and antique cars.
Claying
I used the Baggie Test to check for above surface bonded contaminants and the contamination level was very low but I went ahead and clayed each panel to ensure there were no above surface bonded contaminants and because that's my normal procedure for show car work.
Visual Inspection
I inspected the paint in the sun when Sam first showed me his Porsche and the sun revealed the normal swirls and scratches most all cars have including special interest cars. After wiping the car clean and claying the paint and then wiping the paint clean, I took some pictures to show the swirls...
This is the paint in the middle of the hood just above the Porsche badge, the paint over the rest of the car looked just like this under bright light or in direct sunshine... 
This is the paint on the driver's side of the hood just in front of the windshield... 
A close-up of the same section...
This is the driver's side rear fender, a few days after this picture was taken Brittany will use this area as a mirror... 
Close-ups of the same areas... 
Visual Inspection Results
Overall the paint was filled with swirls, scratches, water spots and some kind of surface staining that required polishing to remove....
Test Spot
I did a Test Spot on the hood just above the Porsche badge and found the Wolfgang Total Swirl Remover and Finishing Glaze were more than up to the job of removing the swirls, restoring a show car finish.
Paint above the green painter's tape is before condition 
I removed the painter's tape and used the residue line to enable the camera to focus on the surface. The paint below the line was machine cleaned with Wolfgang TSR and then machine polished with Wolfgang Finishing Glaze. After the tape was removed the paint was wiped with Mineral Spirits to remove any polishing residue.
The dots or spots you see in the after shots are either pinholes in the paint or tiny specs or divots from rock chips.
Before - the blob above the light is touch-up paint
The Wolfgang Twins worked out to be a perfect fix for Sam the owner because he already owns a PC and I wanted to keep the process simple so that anytime in the future should the need arise he would be able to remove any future swirls and scratches with a proven process that anyone can get pro results with even if it's their first time.
For example,
Proof You Can Do It! - Joe The Detailer - Black Porsche Turned into Black Pearl!
All the techniques I used over this Porsche can be learned from these three resources...
Incredibly detailed and thorough... Tips and Techniques for using the PC 7424XP Dual Action Polisher to remove Below Surface Defects
When machine polishing paint, you can only tackle a small section at a time, how you buff the section is called a "Section Pass". Then you simply repeat a successful
"Section Pass" over the rest of the car and be sure to overlap each section pass a little into the previous section for a uniform appearance.
Show Car Garage Video: How-To do a "Section Pass" when Machine Polishing with a DA Polisher Show Car Garage Video: How To Remove Swirls, Scratches and Water Spots using a PC 7424XP, Meguiar's G110v2 or Griot's Garage 6" Random Orbital Polisher 
Sign-up for Mike Phillips's Detailing Boot Camp September 29th & 30th 
Linear Mode
