Sealant - All I have ever used in Meg's 20. Will give Jeff's Acrylic Jett a try once I use up all my Meg's 20.
Carnauba - ? The last time I used one was before I found out about sealants. I guess it would have been Turtle Wax or some other product bought at a retailer before I found out about all the better products out there.
On a side note: I am somewhat surprised by how much love Meguiars is getting with all the negative posting Meg's gets on these boards. I have never had a problem with Meg's, I just want to give Jeff's a try with all the positive talk it gets on here.