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You are going to get a million suggestions, any good quality wax/polish and sealants will do great. Just make sure you prep the paint first. Is it new or used and what color? Prep the paint by removing old wax and then clay bar the car. As far as what wax/polish to use,
Zaino
Mcguires Nxt
Adams
Rejex
I use Zaino on my Lemans Blue and love the results.
Z-2 works great, z-5 is for the darker colors. The Z-6 detailing spray is also a must have. The more coats of Zaino the wetter/deeper the shine will be. use the Z-6 between coats and between washes. The web site has lots of good info. Oh, please don't forget a excellent quality cotton or top grade microfiber towels.
I use Liquid Ice silicone wax -- very quick, very easy, and looks great.
Stuff is pretty good, I use it on all of my vehicles for the last 5-6 years with no problems or complaints. Plus it is not expensive
Will never wax my cars again after I used Rejex its more like a sealer. The 3 vehicles I have have never been this shiny a simple wipe on and wipe off. Dirt & bugs don't seem to stick any more just take a hose to the car.
I used mothers and a variety of other waxes like Meguirers and liquid glass etc.. for over 10 years. After trying Zaino (z-2, z-6) for the first time this past June I will never go back to wax. Wax simply doesn't compare to the protection and ease of use. The Zaino polish goes on and off so easily and protects for way longer than wax in my experience. I also love that nothin is left behind regardless of where you get the polish. No white dust or residue to deal with in the cracks. That use to annoy the $hit out of me.