Hello and welcome!
First off, definitely don’t spray anything with perfume around the bun. Perfume could be extremely harmful if ingested due to the chemicals and alcohol that make it up.
It IS most likely that bunny is still getting used to his new home, and this is why he is marking a little bit here and there. After a while of being with you and getting fully comfortable, this behavior should subside. If it bothers you too much, you can try confining bun in an x-pen attached to the condo until he becomes more comfortable and stops marking.
As for the chewing, you may want to try blocking the areas he’s chewing with cardboard or cotton towels. It’s likely he’s just chewing, but you are right to be concerned that he may ingest some of it.
Vinegar is a very good way to keep many bunnies from chewing, but the truth is that some bunnies even like the taste, so I think just making it more inaccessible is a more practical solution.