Bit hit and miss. Saw a special edition brand new M3 done this way and it looked amazing! So tempted to get abit of chalk out though 

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yeah rather than matte, im going semi gloss
The picture of the maserati isnt matt black its Satin black which is much better IMO
Good choice of wheel! The BBS LM suits virtually any car!
i'll stick with the dupont, after seeing the results of the debeers on yours, matte looks too dull, and streaky like you say im actually going inbetween matte and semi, but dont know what to call it haha
vinyl would have been my choice for this finish personally.. more durable than a matt black paint finish will be (susceptable to scratching etc)vinyl really doesn't look the same as paint , i have tested the 3m matte black which is the best you can get.
if you do something , really better to do it all the way.