possibly starting detailing business......
I find myself using Menzerna polishes most often with Lake Country light cutting and polishing pads. I also use Poorboy's polish, Klasse AIO, and Zaino ZPC.
303 Carpet Cleaner is really good;
Zaino Z9 and Z10 are what I use for leather and interior. You might also check Leatherique, Leathermaster, and Lexol;
Zaino Z16, Meguiar's Natural Shine, Adam's VRT, Armor All original, etc. for tires, rubber, wheel wells, etc.
I use diluted all-purpose cleaner for wheels, tires, wells, interiors, etc. - diluted as necessary for the job (never use on uncoated wheels);
Flitz, Mother's, NXT All Metal, etc. for polishing metal.
Waxes and sealants are largely personal preference. *I* prefer Zaino Z2 Pro for a sealant and Pinnacle Souveran for a carnauba wax. There are tons of great choices out there. I suggest carrying a few choices for different situations, customers, prices, etc.
What I use and would recomend:
Buffer: PC
Pads: Propel
Polishes: Optimum Car Polish (easy to work with), Optimum Car Compound, Poorboys SSR2.5
Waxes & Sealant: Pretty much all I use now is Chemical Guys Top Coat Sealant or their paste wax
QD: Chemical Guys Pro-Detailer
Leather: Chemical Guys Leather Conditioner and Leather Cleaner
Carpet: Really dont have much of a preference, but most of them work good.
Int. Dressing: CGs VRT Dressing or 303
Tires/wheel wells: Armor All
Wheel and tire cleaner: Eagle 1 All Wheel and Tire Cleaner
Windows: CGs window cleaner
Metal: NXT All Metal Polysh
Car Soap: NXT
Also must have a lot of microfiber for both drying and mult. purpose (wax, polish, etc).
And practice a lot with the buffer before you really go into it. You might also wanna just start off with friends and family so you can get the hang of it and figure out your strong and weak areas. This will also help with the speed. With the type of customer base it seems you will have you will want to take your time and have attention to detail and that is how you will get repeat customers.

