Wunala was heavier than other aircraft with respect to the paint job and it may have been my more than 200kg. A number of numbers I've heard range from 200-500kg.
As others have pointed out, that makes a significant difference with many departures of the 744 at MTOW. The aircraft would most certainly be weighed after painting as every aircraft will have a document listing the BEW of the particular aircraft down to the last kg. EG an empty 767 may be listed as 88039. Another one may be 87458 due to a different galley/ seating config. To suggest that these sorts of things don't matter is completely ignorant.