Wash --> Clay (Mother's is fine OTC) --> 3M polish --> Megs #26 Paste Wax
The paint should be real clean after the polish. If using the 3M product, just do one pass with the orange pad and then one pass with the green pad. I can't gurantee this will work for any hazigng that may appear, but in general, this is what most of us do to rid the car of any hazzing that may appear from harsher product/ pad usage (I have no experience with 3M, so I can't make absolute suggestions).
I can't recommend a sealant b/c I don't use them OTC, but Megs #26 Yellow Paste Wax is a top notch product that will add a nice Nuba' look to your paint. There was a recent thread that addressed some of these same questions. DO a search for "OTC products" or "Best products" .... You should be able to find the thread. Good luck and Welcome to Autopia
JJ