Dealer add-ons like paint sealer or fabric protection are not worth it imo. All modern paint have a clear coat top layer. The paint sealer is just a high quality wax which will eventually wash away. You can apply a good wax on your own.
I never wax my 2002 Jeep and it still looks good after a wash.
I use Turtle Wax Ice liquid wax on my 2002 Miata and it shines and beads water. TW Ice is an easy product to use. You just wipe it on with a foam applicator and wipe it off with the included microfibre cloth. No need for vigorous polishing and it leaves no residue on black plastic. It is like rubbing baby oil on a beautiful woman.
2018 Qashai S AWD 2.0L Canada