It all depends on how long you plan on keeping your Z , what your Z means to you , how much you enjoy people looking at the car and commenting on the super paint job or man its a shame he didnt invest in the refinishing like other things. You cant half arse it and have what you seem to have wanted and still in all likelyhood do want. Like was said depends on if you want to show the car as well. Fortunately I am in good standing with a shop owner here in South Carolina and will be able to avoid getting into the 6 grand arena, at worst Im looking at 2500 form a super body shop that has some fantastic painters. Good luck with the decision.