After putting any type of clear finish on, or over a factory finish I use Butcher's Wax. They use it for Bowling Alleys.(Or used to, not sure about nowadays). It is super hard, and when fresh smells like turpentine. So it has a pine smell, but quickly goes away.
I wax all my bows, especially those with snake skin on limbs at least twice a year with it.
But if you smack your bow, its going to dent, nick, or similar no matter what is on it.
Waxes will help prevent branch and brush scratches, and help keep moisture off the finish, which is very important.