I assume your car is a new car.
If I were you I would:
1. Wash with any good car wash soap found on Autogeek, 2 bucket method. Wash tool is Meguiar's MF mitt, All White ShMitt, or Cobra Bone. I use 1 side of a mitt per panel only so I use 4 mitts for a convertible, more for a sedan. It is very important that your wash tool is white so that you can easily see dirt on your tool. Pick it out by hand before you rub ur mitt against your paint!
2. mild clay with Optimum ONR or Ultima Waterless Wash Plus as lube. Meguiar's Smooth Surface Clay box kit (Autogeek offers the old version of the product though), Sonus white clay or Pinnacle green clay are one of the finest (mild) clays that wont marr your paint.
3. polish with Meguiar's SwirlX / M205 on polishing pad to remove swirls and oxidation.
(4). jewel with Menzerna PO85RD on finishing pad. Takes some time to break it down.
5. seal with a good quality sealant.
Optimum Opti coat is a permanent, super hard coating if you like "once and for all".
Menzerna Power Lock / Collinite 845 are durable, glossy sealant / blended that are inexpensive (less than $20 for 16oz). I found 2+1 thin coats work the best.
(6). top with a good pure paste wax that highlight the pearl flakes.
Poorboy's Natty's Red, DP Max Wax, Pinnacle Sig Series II, or P21s/Sonax 100% Carnauba.
I dont have a white pearl car but you may take a look with how Sonax will look on white pearl here:
http://www.autogeekonline.net/forum/product-reviews/26900-sonax-premium-class-carnauba-wax.html
The steps in () are optional.