I like the way carnaubas look but don't want to sacrifice the durability sealants offer and I almost always top sealants because of this. However I have read a few posts claiming that topping a sealant can decrease it's durability. Has anyone here noticed this? It seems unlikely since the sealant has already bonded to the paint and a good carnauba shouldn't have heavy solvents in it to eat the sealant away. Any thoughts or observations on this?