x 2 ... and it protects your original paintwork underneath it. Its not cheap though, i know someone whos wrapped his 911 c4s in matt white [In-love] but it was 2 grand to have doneit looks amazin if done by a decent sprayer/ bodyshop.
maybe You could consider having it vinyl wrapped, then if You didnt like it that much after a while...You can always take it off. the finish of the vinyl is second to none. maybe a bit more costly tho. just a thought.