Most paint suppliers will automatically buff out your sample panel before they 
scope it. Charles is right though...sometimes even the best in the business 
can't get it correctly matched without a whole bunch of effort. I had to have 
the dark green on my Mini mixed 4 or 5 times before it was correct. On two of 
the batches it actually came out as a metallic green which was a complete 
surprise since the paint on my car wasn't metallic at all.  Make sure they 
shoot a sample panel for you and let it dry thoroughly before accepting it.
 
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