Madflava:
Welcome back. A lot has changed in ten years, detailing-wise.
Where to get started? My first question is, How much time are you going to spend detailing? And then, how much can you afford? Notice I did not say, "How much do you want to spend?" . I say that because the wife and kids may "occupy" your financial responsibilities, as it should.
Low budget:
Invest in some car-washing equipment and products. You are going to have to decide if you are doing a two-bucket wash method (my preference), or a rinse-less wash method.
Two bucket wash: (Assuming you have a Flexon 50-to-100 foot 3/4 inch-ID premium garden hose and Dramm 12721 to 12726 Colored Touch`N Flow Pistol-Grip Spray Nozzle or equivalent)
(3) new 5-gallon bucks or 3-1/2 gallon buckets: one for the sheet-metal/glass/trim soap, one for clear water rinse, and one for rim/tire & wheel-wells soap
(2) Grit guards (I do not use one in the sheet metal soap)
(3) Microfiber noodle wash pads; one for the car, one for the wheel wells, one for door jams
(1) Rim spoke crevice pad or finger pads
(1) Rim E-Z Detail brush OR Wheel Woolie (size to suite rim size)
(1) Tuff Shine Tire Brush
(1) Sonax Insect Sponge
Car Wash soap (depends on last-step product being used; if it is a coating, it may require a coating specific maintenance soap)
Soap for waxes and sealants: Meg`s Detailer Line D110 Hyper-Wash
Tires and Rims:Meg`s Detailer Line D143 Non-Acid Wheel & tire cleaner
Tire Dressing: Meg`s Detailer Line D170 Hyper Dressing or Optimum Opti-Bond Tire Gel
Tire Dressing Applicator: (4) Eagle One tire Sponges
Degreaser (for wheel wells and tires): Optimum Power Clean
Tar Remover: Stoner`s Tarminator
Glass Cleaner: Sprayway Glass Cleaner (inexpensive)
Bug Remover Wash: Poorboy`s World Bug Squash
Drying Aid/Exterior Detailing Spray: Renny Doyle`s Bead Maker
Microfibers:
After-Rinse Drying: (4) Griot`s Garage PFM Terry Weave 16 x 16" Towels
Glass: (4) Griot`s Garage Dual-Weave Glass Towels
General Purpose: (4) The Rag Company Eagle Edgeless 350 Towels (Color choice to suite needs)
Optional Equipment for blow drying:
Inexpensive: Toro Leaf Blower Model 51619
Expensive: Blackfire Car Dryer
More Expensive: Metro MasterBlaster 8hp
With the exceptions of the Toro Leaf blower, Sprayway glass cleaner and Eagle One tire applicator sponge , all of the above is available at the Autopian Store for purchase which supports this forum!
Mid-level budget:
Upgrade your Porter-Cable Dual-Action to either a Rupes 15mm Bigfoot MarkIII or Griot`s Garage G9 or revised Boss 15mm buffer.
You may need to upgrade your pad sizes and foam types for these as well.
Don`t forget about the compounds and polishes to go with these. Just as car-finishes have changed (think scratch-resistant clear coats OR very thin clear coats for cost-savings and emission standards) , so have abrasion technologies and formulations. Griot`s Garage BOSS line is a current forum-favorite. Sonus has some updated compounds and polishes. Jescar has taken over the Menzerna line in the USA. AND, some of the coating manufacturer`s listed below have their own lines of compounds and polishes.
Scholl`s Concepts is another European manufacturer of pads and polishes to consider.
"Bigger" budget:
Invest in coatings. In my own hypocrisy, I am still a carnauba-wax guy (Collinite 915), but I am behind the times and old-school.
Coating manufacturers to consider and research:
Polish Angel
Car-Pro
G-Techniq
IGL Coating
22ple
GYEON
Optimum Polymer Technology
Yes, there are others, and some are ONLY available to certified detailers and installers (manufacturer-trained application specialists).
I hate to say it, but it may be a better "economic decision" for you to consider having a professional detail your Audi R8 and you do the wash-maintenance thing. Coatings have a long life (2 or more years), but the key is surface preparation, and not everyone has the time, skill and experience, and equipment to achieve the stellar car-show, head-snapping results that you ultimately want.