Meguiars 205 is the finishing polish which should be used right after claying and washing if you want to remove light micro marring or swirls. After polishing if there are deeper swirls left or you're looking for more depth in paint then go for #7 glaze to fill in the imperfections enhance the depth and then #26 to lock in the oils and make the glaze last.
Otherwise, with no glazing step, you can seal with either #21 or UW, let the layer cure, add another or use #26 for a sealant + carnauba combo.
Also, you may try, after polishing #7 then #21 and then #26 but the oils in the glaze may prevent the sealant from getting maximum durability due to bonding issues.