Paint code match up

Before you spray the whole door can I suggest that you get out some cutting compound and buff the door back first then compare the colour match. I got very lucky with the Hino White when I had a can mixed up by an auto spare parts shop. I was very happy to see this guy being so bloody careful in the mixing of the paint code by weight. Going as far as removing tiny amounts of the last tint by use of a tooth pick and he would not add the next tint until he was happy. Boy I should have got him to mix a couple of tins up for me as the colour match was perfect but the store is now permanently closed after the recent floods.