Why would they need doing again if pick up a stone chip?
Just look after them
Ensure you keep them well sealed with a decent wax
Touch up any stone chips with clear laquer to prevent salt etc attacking the polished face
As for kerb rash you could say that about any wheel as they all look terrible if kerbed, simple andwer to that is don't kerb them or better still don't let the missus drive it
My polished Monza's are now over 7 years old and still looking great, few minor marks etc on them but otherwise spot on
Ps around £400 for full refurb including tyre removal/refit and balance sounds preety decent price really