some can do each, like ammo hydrate. i normally use chemical guys v07 as i dry. however fast detailer is okay too. including lubrication to the drying course of isn’t a foul factor.
fast detailer is not meant to wash total panels, its extra for contact ups from a bug or chicken dropping. ive seen folks use to do hoods and stuff earlier than a meet, works okay for metallic whites, silvers, greys as these colours dont present swirls. i’d by no means use that process on a darkish black/blue although.