Everything? no. It may be everything you need depending on the condition of your car...does it have swirls that you want to get rid of? You'll have to get a swirl removal product if you want to remove them.
Also, other stuff besides paint is important...trim and tires should be dressed, and I'd put klasse aio on your wheels too, but skip the
souveran.
I hope that gives you some things to think about, but even as-is, it won't be a waste of time.
[list=1][*]# start with a wash such as P21S
# use a clay bar
# wash again
# use a swirl mark remover
# possible wash or quick detail, but not necessary, IMO
# dress trim + tires before or after all waxing, your choice
# apply coat of AIO
# finish with Souveran [/list=1]