[Perfectlap]

well the Porsche factory paint might not match your car anymore because of weathering. Get a guarantee in writing for 100% satisfaction.

I had a black car before and that's one of the easier colors to match and still I had lots of problems and the job had to be done more than once. One thing to consider is how clean is the shop and their booth? You might get an excellent color match only to have it ruined by lint and dust adhering beneath the clear coat. $600 sounds right but its a shame the car is only four years old.
Look into getting STONGARD clear bra a couple months after the paint job.