Optimum Power Clean - tough spots like sap, tar, bugs, etc.
Optimum No-Rinse - Hose-free wash
Optimum Instant Detailer and Gloss Enhancer - Quick Detailer after washing
All you need are a few extra-thick micro fiber towels. These are nice http://www.detailedimage.com/DI-Micr...18/16-x-16-S1/
Detailed Image sells a well thought out package online which has these products, a bucket, towels etc and it's what I use. http://www.detailedimage.com/Pro-Kit...-Wax-Kit-P442/
No preference on where to shop for these, but this is just an example of what I have.
Here's my post from when I used Optimum after snow subsided:
If what you want is a full-on detail, then there's no easy way. It's at least a 4-step process:
Wash/Decontaminate (strips old wax in the process)
The investment in the proper products and tools for this makes it ideal to pay a professional who can do a proper detail. Avoid people who do a 1-step polish/wax, as those hardly do the job on hard Audi paint, nor does the wax stand a chance of lasting longer than 2-3 months.
If you are going to do your own detail, then use something like Chemical Guys Citrus Wash, then a clay bar, followed by Menzerna with an orbital buffer (Porter Cable 7424xp) OR P21s Paintwork Cleanser by hand to polish and remove scratches and swirls. Then use a decent wax like P21s or Chemical Guys Jetseal 109.
This will take several hours, so plan on 2 days over the weekend, and about 2 cases of beer.