I have used Menzerna polishes to bring the shine out and keep it looking wet. Wax with a high quality wax like Blitz; P21S, Blackfire, or something similar.
The biggest problem with liquid wax is that it lasts about as long as a good car wash. There are two types of wax, carnuba and products like Zaino and Menzerna FMJ. the carnuba waxes last a few weeks and need to be reapplied for continuing protection. The synthetic waxes last longer, but some people with dark (red, black navy blue) say that it actually shines differently.
The car should be washed with high quality soap and dried with microfiber towels, to prevent swirl marks.
Good leather products arehttp://
www.properautocare.com/leatcarprod1.html here. I have always used Lexol for all of my leather care.
This is one of my favorite sites for things to use and some advice
http://www.properautocare.com/.
Consider investing in a good 7424 Porter Cable random orbital buffer, this little wonder makes even the rookies like me look good.
Unfortunately, in my opinion, the protection warranties that the dealers sell are more to line the dealers pockets than to protect you from an unknown hazzard.
Good luck