I have been using Meguiars Cleaner/Wax (blue bottle) for many years with good results. But this spring I tried Meguiars Flagship Cleaner/Wax (black bottle) and it is now my go to wax. It cost a little more but the finish is great so the extra price is worth it to me. Just got home Friday from a trip and the front was bug coated and sides were very dirty. I washed the rig and it looks like I just waxed it and the bugs are gone!
I use an orbital buffer to apply wax and buff the finish, at least twice a year. Yes, a lot of work but I like the results and comments I get about my "new" rig. It is 12 years old. :C